What Came Up When The Brush Was Cleared<\/p>\n
Nobody was looking for ancient human remains in the cedar and mesquite brush of the Edwards Plateau when the discovery began.<\/p>\n
A landowner was clearing the scrubland along the property line between two ranches in what is now northwestern Kerr County, Texas \u2014 rough limestone hill country about twenty miles southeast of the town of Junction.<\/p>\n
The Edwards Plateau here is karst terrain: the underlying limestone is porous and cracked, shot through with natural cavities that form as slightly acidic groundwater dissolves the rock over thousands of years.<\/p>\n
Sinkholes are everywhere.<\/p>\n
Most are shallow depressions, unremarkable features of the landscape.<\/p>\n
This one was different.<\/p>\n
The landowner found an oval-shaped opening in the ground, measuring roughly seven feet by twelve feet, with a dead tree protruding from it.<\/p>\n
Beneath the tree, a dark shaft dropped into the earth.<\/p>\n
It was filled to within about ten feet of the surface.<\/p>\n
When he descended into it, he did not find what he expected.<\/p>\n
He found skulls.<\/p>\n
And along with the skulls, the spinal column of a wolf.<\/p>\n
He contacted archaeologists at the University of Texas at Austin.<\/p>\n
What followed was one of the most significant cave burial investigations in the history of American archaeology \u2014 a multi-year excavation that uncovered the remains of at least sixty-two individuals, spanning thousands of years of human history on the Texas Hill Country, and that raised questions about ancient DNA, population history, and the identity of the first Texans that are still being debated today.<\/p>\n
The site became known as Bering Sinkhole, designated in archaeological records as 41KR241, located in the heart of the Edwards Plateau.<\/p>\n
Its earliest burials have been radiocarbon dated to approximately 5000 BCE \u2014 roughly 7,000 years ago \u2014 placing them in the latter part of the Early Archaic period.<\/p>\n
The headline promises 8,500-year-old skeletons in a Texas cave, and this article will deliver that \u2014 because Bering Sinkhole’s story does not stand alone.<\/p>\n
<\/p>\n
It connects to a larger universe of ancient Texas burials, including the Buckeye Knoll site in Victoria County, where the earliest graves date to approximately 8,500 years ago, and where archaeologists uncovered one of the largest Early Archaic cemeteries in all of North America.<\/p>\n
These are not isolated discoveries.<\/p>\n
Together, they form the most complete picture yet assembled of who was living in Texas eight to ten thousand years ago \u2014 and the ancient DNA questions embedded in their bones have become central to understanding the deep human history of the continent.<\/p>\n
The Plateau That Holds Its Dead<\/p>\n
To understand why these discoveries matter, you need to understand the landscape where they happened.<\/p>\n
The Edwards Plateau is a vast limestone upland occupying the heart of central and west-central Texas.<\/p>\n
It covers roughly 24,000 square miles, an elevated table of rock tilted slightly toward the southeast, cut by river canyons on its edges \u2014 the Llano, the Guadalupe, the Pedernales, the Nueces.<\/p>\n
Its surface is mantled in thin soil and cedar scrub, prickly pear, live oak.<\/p>\n
Beneath the surface, the karst geology creates a hidden world of cavities, caves, and sinkholes formed over millions of years by the slow dissolution of limestone.<\/p>\n
This landscape has been occupied by human beings for at least 13,500 years, possibly much longer.<\/p>\n
The first inhabitants \u2014 the Paleoindians who entered the Americas as the great ice sheets retreated \u2014 moved through Texas pursuing mammoth, horse, giant bison, and other megafauna now long extinct.<\/p>\n
Later, as the climate warmed and dried and the megafauna disappeared, the people adapted.<\/p>\n
They became what archaeologists call Archaic hunter-gatherers: mobile, flexible, expert at reading the landscape, moving seasonally through territories they knew intimately, hunting deer and pronghorn and small game, harvesting plant foods, fishing the rivers.<\/p>\n
It is these Archaic people \u2014 the hunter-gatherers who lived in Texas between roughly 10,000 and 2,000 years ago \u2014 whose remains have been preserved in the sinkholes and caves of the plateau.<\/p>\n
<\/p>\n
And it is their DNA, or the mysteries of their DNA, that have generated some of the most intriguing debates in the study of early American prehistory.<\/p>\n
Prehistoric cemeteries are uncommon on the Edwards Plateau.<\/p>\n
Unlike the coastal plains of south and southeast Texas, where open cemeteries containing dozens of burials have been found, the Plateau’s dead seem to have been placed differently.<\/p>\n
Based on excavations at sites like Bering Sinkhole, and on the broader pattern of cave and sinkhole use across the region, archaeologists have concluded that the natural openings in the limestone were not merely convenient disposal sites.<\/p>\n
They were sacred passages.<\/p>\n
<\/p>\n
Drawing on what is known about the beliefs of Native peoples in the American Southwest and northern Mexico, researchers have proposed that these natural vertical shafts \u2014 leading down into the dark interior of the earth \u2014 were understood as symbolic entrances to the underworld, or what some traditions describe as the world of the ancestors.<\/p>\n
The dead were not tossed in.<\/p>\n
They were carefully placed within these limestone passages, accompanied by objects that mattered \u2014 shell ornaments from coasts hundreds of miles away, antler tools, stone artifacts, items that spoke of a life lived on the plateau.<\/p>\n
The sinkhole was a doorway.<\/p>\n
The people who placed their dead within it believed they were sending them somewhere.<\/p>\n
When the landowner descended into Bering Sinkhole and found those skulls, he was looking at the preserved remains of this ancient practice \u2014 a cemetery in use for thousands of years, sealed by limestone walls, its contents preserved by the unusual underground environment of the Texas Hill Country.<\/p>\n
<\/p>\n
What The Excavation Revealed<\/p>\n
Archaeologists from the Texas Archeological Research Laboratory conducted formal excavations at Bering Sinkhole between 1987 and 1991.<\/p>\n
The work was led by Leland C.<\/p>\n
Bement, who would later publish his doctoral dissertation on the site through the University of Texas Press.<\/p>\n
Below its vertical shaft entrance, the sinkhole opened into a larger chamber measuring approximately twelve by forty feet, at least twenty-five feet deep.<\/p>\n
This chamber was filled with natural sediment \u2014 accumulated over thousands of years as material fell or washed in from above, as animal remains entered the shaft, and as deliberate human burials were placed within.<\/p>\n
<\/p>\n
Working through those sediments, the archaeologists recovered more than 1,500 human bone specimens representing at least sixty-two individuals.<\/p>\n
The range of ages represented in the burial population was striking.<\/p>\n
Infants.<\/p>\n
Children.<\/p>\n
Adults of various ages.<\/p>\n
Elderly individuals \u2014 or what counted as elderly in the prehistoric Plateau, which may not have been very old by modern standards.<\/p>\n
Both males and females were present.<\/p>\n
The pattern was consistent with a community cemetery: a place where people were brought over generations, across the full span of life.<\/p>\n
<\/p>\n
Radiocarbon dating established that the earliest burials at Bering Sinkhole dated to approximately 5000 BCE \u2014 placing them in the latter Early Archaic period, when the people of the Plateau were becoming increasingly sophisticated in their adaptation to the post-glacial Texas environment.<\/p>\n
The latest burials dated to approximately 500 CE, meaning the site was in use for roughly 5,500 years.<\/p>\n
Five thousand five hundred years of continuous use as a burial ground.<\/p>\n
That span alone \u2014 longer than the entire history of classical civilization from ancient Sumer to the present \u2014 speaks to the stability of the populations who used the sinkhole and to the strength of the traditions that made it sacred.<\/p>\n
Generation after generation, for two hundred generations, the people of the central Edwards Plateau brought their dead to this same dark shaft in the limestone and committed them to the underworld.<\/p>\n
<\/p>\n
The artifacts found with the burials told a story of connection.<\/p>\n
Marine shells \u2014 from the Gulf of Mexico coast, hundreds of miles to the southeast \u2014 had been fashioned into ornaments and placed with the dead.<\/p>\n
Antler tools.<\/p>\n
Stone artifacts made from local flint.<\/p>\n
The material culture of people who were mobile but not isolated, who were connected through trade and kinship to wider networks across the region and beyond.<\/p>\n
And the bones told their own story, one that physical anthropologists and, later, geneticists would work to interpret.<\/p>\n
The Remarkable Record At Buckeye Knoll<\/p>\n
<\/p>\n
While Bering Sinkhole was attracting scholarly attention on the Edwards Plateau, a different and even more striking discovery was unfolding along the lower Guadalupe River in Victoria County, in the coastal plain region southeast of the plateau.<\/p>\n
The Buckeye Knoll site, designated 41VT98, sits in the Guadalupe River floodplain in the southern part of Victoria County.<\/p>\n
Unlike the sinkholes of the Edwards Plateau, Buckeye Knoll is not a cave.<\/p>\n
It is an open site \u2014 a cemetery on the surface, or just below it, established by Archaic hunter-gatherers along the rich resources of the Guadalupe River valley.<\/p>\n
But its age is extraordinary.<\/p>\n
Radiocarbon dating using tooth and bone collagen samples from multiple individuals placed the earliest burials at Buckeye Knoll at approximately 8,500 years before present \u2014 the beginning of the Early Archaic period in Texas, a time when the last of the great Pleistocene megafauna were disappearing and the continent was still adjusting to the climate of the post-glacial world.<\/p>\n
<\/p>\n
Eight thousand five hundred years ago.<\/p>\n
When those earliest Buckeye Knoll burials were laid down, the Egyptian pyramids were more than 5,000 years in the future.<\/p>\n
The writing systems of Mesopotamia had not yet been invented.<\/p>\n
Europe was still in the Stone Age.<\/p>\n
The people of China were beginning the earliest experiments with rice cultivation.<\/p>\n
And on the coastal plain of Texas, people were burying their dead in a cemetery that would be used, continuously, for thousands of years.<\/p>\n
The scale of what was found at Buckeye Knoll was staggering.<\/p>\n
<\/p>\n
Although only a portion of the site had been excavated by the time major investigations were completed, the cemetery was estimated to have held at least two hundred individuals, making it one of only three large mortuary sites known in North America that date to seven to eight thousand years ago.<\/p>\n
The others were Carrier Mills in southern Illinois and Windover in east-central Florida.<\/p>\n
The lead archaeologist studying the materials, Bob Ricklis of the Corpus Christi office of Coastal Environments Inc., captured the significance in stark terms: “We did not know this culture existed.<\/p>\n
Period.<\/p>\n
We didn’t know anything about it.”<\/p>\n
The people who had built the Buckeye Knoll cemetery were not what the dominant narrative of Archaic hunter-gatherers had suggested.<\/p>\n
They had lifespans comparable to modern people.<\/p>\n
<\/p>\n
They had contacts with others as far away as what later became the Southeast and Midwest United States \u2014 evidence written in the artifacts found with the burials.<\/p>\n
Marine shells from distant coasts.<\/p>\n
Materials that had no local origin.<\/p>\n
A cemetery organized in ways that suggest social complexity and established belief systems.<\/p>\n
“They are more advanced than we would have expected,” Ricklis said.<\/p>\n
“This is of great importance.”<\/p>\n
It rewrote the history not just of the region but, in the words of the archaeologists involved, of the nation.<\/p>\n
The DNA Question \u2014 And Why It Became Complicated<\/p>\n
<\/p>\n
The human remains at sites like Bering Sinkhole and Buckeye Knoll are not merely archaeological curiosities.<\/p>\n
They are, potentially, biological archives \u2014 repositories of genetic information that could illuminate the population history of North America in its earliest post-glacial centuries.<\/p>\n
Ancient DNA science has transformed archaeology over the past two decades.<\/p>\n
The ability to extract and sequence the genetic material preserved in ancient bones and teeth has made it possible to ask questions that were previously unanswerable: Who were these people, genetically?<\/p>\n
Where did they come from?<\/p>\n
<\/p>\n
Are they related to the Indigenous peoples who inhabited the same region when Europeans arrived?<\/p>\n
And how do their genomes compare to other ancient Americans from the same period, from other regions, from other parts of the continent?<\/p>\n
For the Texas sites, these questions are charged with both scientific and cultural significance.<\/p>\n
The scientific significance is clear.<\/p>\n
The terminal Pleistocene and Early Archaic periods \u2014 from roughly 13,000 to 6,000 years ago \u2014 are among the most important and least understood in the genetic history of the Americas.<\/p>\n
Very few individuals from this period have been successfully genetically analyzed, because ancient DNA degrades rapidly in warm, humid conditions.<\/p>\n
<\/p>\n
The hot climate of Texas has historically made it a difficult region for ancient DNA preservation.<\/p>\n
The number of individuals from the Early Archaic period whose genomes have been studied is small, and each new individual represents a significant addition to the picture.<\/p>\n
Bering Sinkhole’s remains, preserved in the relatively stable underground environment of the limestone cave system, represent a potential opportunity.<\/p>\n
The cave environment \u2014 with its more constant temperature and reduced humidity compared to the surface \u2014 offered better preservation conditions than most open Texas sites.<\/p>\n
Whether actual DNA analysis has been successfully conducted on Bering Sinkhole specimens, however, is a question that reflects a much larger issue: the intersection of science with Indigenous sovereignty over ancestral remains.<\/p>\n
<\/p>\n
At Buckeye Knoll, this intersection became a national story.<\/p>\n
The Controversy That Made National News<\/p>\n
The discovery and excavation of Buckeye Knoll did not proceed smoothly.<\/p>\n
It became, instead, a case study in the conflicts that arise when the scientific imperative to study ancient remains collides with the legal and moral claims of Indigenous communities.<\/p>\n
The site was discovered in the context of a practical engineering project: the anticipated widening of the Victoria Barge Canal, an artificial waterway used by petrochemical plants for transporting materials, which transected the site.<\/p>\n
The U.S.<\/p>\n
<\/p>\n
Army Corps of Engineers, as the federal agency with responsibility for the project, became involved in the question of how to handle the archaeological discovery.<\/p>\n
A data recovery plan was developed and formal excavations began around 2001.<\/p>\n
What the excavations revealed \u2014 the extraordinary scale and antiquity of the cemetery, the biological and cultural richness of the burials \u2014 made the question of what to do with the remains both scientifically urgent and legally complicated.<\/p>\n
Under the Native American Graves Protection and Repatriation Act, passed by Congress in 1990, federal agencies and institutions receiving federal funding are required to inventory their holdings of Native American human remains and cultural items, notify affiliated tribes, and repatriate those items upon tribal request.<\/p>\n
The question of cultural affiliation \u2014 which contemporary tribe or tribes are the lineal or cultural descendants of the ancient individuals \u2014 is central to the NAGPRA process.<\/p>\n
<\/p>\n
At Buckeye Knoll, that question was genuinely difficult.<\/p>\n
The cemetery’s earliest burials date to 8,500 years ago.<\/p>\n
Establishing a direct cultural and biological link between people who lived nearly one hundred centuries ago and any contemporary federally recognized tribe requires evidence that the archaeological and genetic record can rarely provide at that time depth.<\/p>\n
The landscape of Texas tribes had shifted dramatically in the intervening millennia, through migrations, extinctions of specific groups, absorptions, and the catastrophic depopulation that followed European contact.<\/p>\n
Controversy arose over the conflict between scientific priorities and those of various Native American groups.<\/p>\n
<\/p>\n
The land containing the site was owned by the DuPont Corporation (now Invista), adding a corporate dimension to the negotiations.<\/p>\n
After protracted discussions involving federal and state agencies, federally recognized tribes, other Indian groups, private corporations, and archaeological organizations, a compromise was reached.<\/p>\n
The archaeological team was given several years to study the remains and conduct scientific analyses.<\/p>\n
Then, in April 2006, the human remains and associated grave goods were reburied by members of the Lipan Apache Band of Texas and the Invista Corporation.<\/p>\n
The reburial was, from a legal and ethical standpoint, a resolution.<\/p>\n
<\/p>\n
From a purely scientific standpoint, it was also a permanent closure.<\/p>\n
As the Texas Beyond History project, a public education initiative of the University of Texas, noted afterward: “From a scientific perspective, it is very doubtful that any Indian peoples speaking any of the Athapascan languages \u2014 such as Lipan Apache \u2014 are actually descendants of those who were buried at Buckeye Knoll.”<\/p>\n
The statement reflects one of the fundamental tensions in the archaeology of very ancient remains: the individuals who are most scientifically valuable, precisely because they are so ancient, are also the individuals whose cultural affiliation with any contemporary tribe is hardest to establish.<\/p>\n
The further back you go, the more likely it is that the populations of the past were organized differently, spoke different languages, and had different cultural traditions from anything that survived into the historical period.<\/p>\n
<\/p>\n
After the reburial at Buckeye Knoll, any future data collection or analysis must come from the digital photographs and records collected during the excavations.<\/p>\n
The physical archive is closed.<\/p>\n
What The Ancient Bones Looked Like \u2014 Before Science Could Read Them<\/p>\n
The preserved remains from Texas cave and sinkhole burials allow physical anthropologists to reconstruct, within limits, the biological profile of the individuals buried there \u2014 not their identities, not their names, not their stories in the human sense, but their physical lives.<\/p>\n
The work that has been done on the Bering Sinkhole skeletal population, and on the Buckeye Knoll sample where analysis was completed before reburial, reveals a picture of early Texas Archaic life that is both recognizable and deeply foreign.<\/p>\n
The individuals were generally healthy, by the standards of prehistoric hunter-gatherers.<\/p>\n
<\/p>\n
Leland Bement’s analysis of the Bering Sinkhole population found evidence of physical activity levels that would be extraordinary by modern standards \u2014 the kind of bone remodeling that results from a lifetime of walking, carrying, and working in ways that sedentary modern people never experience.<\/p>\n
The people of the Edwards Plateau were physically demanding animals, shaped by the requirements of a mobile subsistence life in a landscape where everything required effort.<\/p>\n
Their teeth told a similar story.<\/p>\n
Dental wear patterns at ancient Texas sites show the kind of abrasion that comes from eating food processed with stone tools \u2014 grit and stone particles worked into the food during grinding and pounding, wearing down the tooth surfaces over years of eating.<\/p>\n
The teeth of Archaic Texas hunter-gatherers are often worn to the root by middle age.<\/p>\n
<\/p>\n
But the dental record also preserved something else: evidence of periodic stress and hardship.<\/p>\n
Studies of the Buckeye Knoll population examined linear enamel hypoplasia defects in permanent canine teeth \u2014 horizontal grooves or pits in the enamel that form when normal tooth development is interrupted during childhood by illness, nutritional stress, or other physiological disruption.<\/p>\n
The findings showed that fifty-nine percent of individuals examined had at least one such defect.<\/p>\n
Stress was common.<\/p>\n
Hard times visited these populations regularly.<\/p>\n
But the populations persisted, adapting to the rhythms of the plateau and the coastal plain, building knowledge of their landscapes that was accumulated across generations.<\/p>\n
<\/p>\n
The Bering Sinkhole population also yielded a discovery that was remarkable in a purely biological sense.<\/p>\n
Among the individuals deposited in the sinkhole, one woman was found to have experienced a lithopedion \u2014 a stone baby.<\/p>\n
This is the rare obstetric circumstance in which a fetus that has died and cannot be delivered begins to calcify within the mother’s living body, essentially being incorporated into her tissues as a calcified mass over years or decades.<\/p>\n
The lithopedion from Bering Sinkhole dates to approximately 1100 BCE and is the earliest documented case of this phenomenon in the entire human medical record.<\/p>\n
She had carried this within her for years, perhaps decades.<\/p>\n
<\/p>\n
It had become part of her body.<\/p>\n
And when she died and was placed in the sinkhole, it came with her.<\/p>\n
The Environment They Inhabited \u2014 Texas Eight Thousand Years Ago<\/p>\n
To understand who the ancient Texans were, you need to understand the world they lived in \u2014 because it was meaningfully different from the Texas of today.<\/p>\n
Eight thousand five hundred years ago, when the earliest Buckeye Knoll burials were being laid down, the climate of central and coastal Texas was still in the post-glacial transition.<\/p>\n
The great ice sheets of the Pleistocene had retreated northward, but the climate had not yet settled into the pattern of the modern period.<\/p>\n
<\/p>\n
Conditions were somewhat wetter and cooler than today in many parts of Texas, though the Edwards Plateau was already becoming the semi-arid terrain it remains.<\/p>\n
The Guadalupe River, along whose banks Buckeye Knoll was established, would have been a richer biological environment than it is today.<\/p>\n
Before dams, before overgrazing that eroded the watershed, before the introduction of exotic species that destabilized native communities, the Guadalupe supported abundant fish populations, freshwater mussels, turtles, and the wildlife that congregated at a reliable water source in a semi-arid landscape.<\/p>\n
The isotopic analysis of the Buckeye Knoll skeletal remains confirmed what this ecology would predict.<\/p>\n
<\/p>\n
Carbon and nitrogen stable isotope ratios in bone collagen \u2014 a chemical record of what individuals ate over the years their bones were being built and remodeled \u2014 showed that the earliest populations at the site had diets heavy in aquatic protein.<\/p>\n
Fish.<\/p>\n
Freshwater mussels.<\/p>\n
Resources from the river.<\/p>\n
This dietary signature decreased in later populations at the site, suggesting that aquatic resource use declined as the Archaic period progressed \u2014 perhaps as the river’s productivity changed, perhaps as population pressure increased and groups diversified their dietary strategies.<\/p>\n
The shift in diet encoded in their bones tells a story of adaptation: these were not static populations frozen in time.<\/p>\n
They were people responding to changing conditions, shifting their strategies as the environment around them changed.<\/p>\n
<\/p>\n
The marine shells found in the burials at Bering Sinkhole and other Texas sites speak to a different kind of adaptation: the maintenance of trade and exchange networks across enormous distances.<\/p>\n
The Gulf of Mexico coast is hundreds of miles from the Edwards Plateau.<\/p>\n
Marine shells that have been found in interior Texas Archaic burials were not transported by accident.<\/p>\n
They were traded, carried, valued \u2014 objects that had traveled far from their origin and were considered worth placing with the dead.<\/p>\n
This exchange was not exceptional.<\/p>\n
It was routine.<\/p>\n
The people of Archaic Texas were embedded in continental-scale networks of exchange that connected communities across the southern half of North America.<\/p>\n
What The DNA Might Have Said<\/p>\n
<\/p>\n
The ancient DNA question for the Texas sites is partly a question about what has been studied and partly a question about what could not be studied because of the conditions of preservation and the decisions about repatriation.<\/p>\n
The challenges of ancient DNA preservation in Texas are significant.<\/p>\n
DNA degrades over time through hydrolysis and oxidation \u2014 the same processes that break down other organic molecules in buried remains.<\/p>\n
The rate of degradation is strongly temperature-dependent: warmer conditions accelerate breakdown.<\/p>\n
In tropical and warm-temperate environments, ancient DNA survives for much shorter periods than in cold or arctic conditions.<\/p>\n
For this reason, the oldest successfully analyzed ancient DNA has consistently come from permafrost sites in Siberia, Alaska, and other cold regions, where temperatures close to freezing slow the degradation process dramatically.<\/p>\n
Texas is not cold.<\/p>\n
<\/p>\n
Its summers are hot.<\/p>\n
The DNA preservation potential for ancient skeletal remains in Texas open sites is generally poor.<\/p>\n
The specific question of whether DNA has been successfully extracted from Bering Sinkhole specimens \u2014 which had the advantage of the underground environment \u2014 is not definitively resolved in the published scientific literature in the same way that analyses of colder-region finds have been.<\/p>\n
But the broader ancient DNA picture of early North America, assembled from dozens of successfully analyzed ancient individuals from across the hemisphere, provides a context into which the Texas populations can be placed \u2014 even when their own DNA has not been directly studied.<\/p>\n
And that picture has become one of the most fascinating and contested areas of modern science.<\/p>\n
<\/p>\n
The Peopling Of The Americas \u2014 What Ancient DNA Has Revealed<\/p>\n
The question of who the ancient Texans were is inseparable from the larger question of who the first Americans were and how they got here.<\/p>\n
And on that question, ancient DNA science has produced some of the most surprising findings in the history of human genetics.<\/p>\n
The long-dominant model for the peopling of the Americas was the Clovis First hypothesis: the first humans entered North America from northeastern Asia across the Bering Land Bridge, moved south through an ice-free corridor between the retreating Laurentide and Cordilleran ice sheets, and spread rapidly across the continent.<\/p>\n
The Clovis people \u2014 named for their distinctive fluted stone projectile points, first identified near Clovis, New Mexico \u2014 were thought to be the founding population of the Americas, their descendants diversifying into all the Indigenous nations that Europeans later encountered.<\/p>\n
<\/p>\n
That model has been substantially revised in the past twenty years.<\/p>\n
Ancient DNA analysis of individuals from across the Americas has revealed a population history far more complex than the simple Clovis-first scenario.<\/p>\n
Multiple studies have established that the ancestors of contemporary Native Americans diverged from other Asian populations and entered a period of geographic isolation \u2014 possibly in Beringia, the land between Siberia and Alaska that was exposed above sea level during periods of low sea levels \u2014 before spreading into the Americas.<\/p>\n
During this isolation period, estimated to have lasted thousands of years, the founding population diversified genetically before dispersing southward.<\/p>\n
<\/p>\n
Critically, ancient DNA evidence from multiple sites across North and South America has confirmed that the first Americans arrived before the Clovis archaeological horizon \u2014 that the continent was occupied by people who were already here before the distinctive Clovis technology appeared.<\/p>\n
Sites like Monte Verde in Chile, Cooper’s Ferry in Idaho, and others have pushed the timing of initial human arrival well before 15,000 years ago.<\/p>\n
What this means for the ancient Texans \u2014 the people buried at sites like Bering Sinkhole and Buckeye Knoll \u2014 is a context that places them in the early stages of the establishment of populations across the continent.<\/p>\n
They were not the absolute first inhabitants of Texas, but they were among the earliest well-documented populations, and their biological characteristics were being shaped by thousands of years of life in the North American interior.<\/p>\n
<\/p>\n
The Early Archaic People \u2014 Who They Were And How They Lived<\/p>\n
The Early Archaic period in Texas, spanning roughly from 10,000 to 6,000 years before present, represents the phase when human populations on the plateau and coastal plain were completing their adaptation to the post-Pleistocene world.<\/p>\n
The great megafauna \u2014 the mammoths, mastodons, giant sloths, camels, horses, and other large animals that had characterized the Pleistocene \u2014 were gone by the beginning of the Archaic period, or were in their final decline.<\/p>\n
The extinction of these animals was one of the defining events of the period, and its causes are still debated: climate change, human hunting pressure, or some combination of both.<\/p>\n
<\/p>\n
Whatever drove the extinctions, the people who had organized their lives around hunting these large animals had to adapt.<\/p>\n
They did.<\/p>\n
The Archaic populations of Texas developed a diversified subsistence economy that drew on the full range of resources their environments offered.<\/p>\n
In the river valleys, fish, freshwater mussels, and turtles became dietary staples.<\/p>\n
On the uplands, deer, pronghorn, and a wide variety of small game were hunted.<\/p>\n
Plant foods \u2014 gathered roots, seeds, fruits, and the underground storage organs of various plants, cooked in earth ovens called burned rock middens \u2014 became increasingly important.<\/p>\n
The burned rock middens that are among the most characteristic features of the Texas Archaic landscape are enormous accumulations of fire-cracked limestone, the debris from thousands of cooking events carried out over generations of occupation at favored camp sites.<\/p>\n
<\/p>\n
These middens represent hundreds or thousands of years of intermittent use \u2014 groups returning to the same locations season after season, decade after decade, century after century, building up the debris of their cooking fires into mounds that are still visible on the landscape today.<\/p>\n
The people who built those middens were not nomads in the chaotic sense of random wandering.<\/p>\n
They were following established seasonal rounds, moving between known locations in a planned sequence tied to the availability of different resources at different times of year.<\/p>\n
They knew their landscapes as intimately as any people who have ever lived in them.<\/p>\n
They had mental maps of water sources, of plant food distributions, of game movement patterns, of the locations of good flint for tool-making.<\/p>\n
They also had social networks that extended far beyond their immediate territories.<\/p>\n
<\/p>\n
The trade in marine shells, in exotic stone materials, in finished artifacts that appear far from their places of origin \u2014 all of this reflects a world of social connection that ranged across the southern half of North America.<\/p>\n
Groups that might be separated by hundreds of miles met periodically, traded, exchanged marriages, shared information.<\/p>\n
The Texas Archaic hunter-gatherers were embedded in a continental society, not isolated bands.<\/p>\n
The World The Plateau People Shared<\/p>\n
The ancient Texas populations did not exist in isolation.<\/p>\n
The broader North American world they inhabited was populated by other groups across the continent, and the genetic and archaeological evidence from those other groups illuminates the context in which the plateau and coastal plain peoples lived.<\/p>\n
To the east, in what is now Florida, the Windover site \u2014 one of the other three major early North American cemeteries that Buckeye Knoll ranked alongside \u2014 had preserved the remains of early Archaic individuals in a pond bog, with extraordinary preservation that allowed DNA extraction.<\/p>\n
<\/p>\n
The Windover individuals, dating to roughly 7,000 to 8,000 years ago, showed genetic characteristics that have contributed to the understanding of early eastern North American populations.<\/p>\n
To the north, in what is now the Midwest, similar populations of Early Archaic hunter-gatherers were developing the complex mortuary traditions and exchange networks that would eventually culminate in the elaborate ceremonial systems of the Woodland period.<\/p>\n
To the south and west, in the desert Southwest and the Great Basin, other Early Archaic populations were adapting to different environments with different subsistence strategies, but maintaining the same kind of long-distance exchange connections that characterized their Texas contemporaries.<\/p>\n
The picture is of a hemisphere-wide human presence, varied in its specific adaptations but connected through exchange, shared technological traditions, and \u2014 as ancient DNA is beginning to reveal \u2014 shared genetic ancestry that traced back to the founding populations who had crossed into the Americas from northeast Asia.<\/p>\n
<\/p>\n
Within this continental picture, the Texas populations occupy a specific and significant position.<\/p>\n
The coastal plain of Texas, and the river valleys leading into the interior, would have been among the most productive environments in North America for Early Archaic hunter-gatherers.<\/p>\n
The Guadalupe River corridor, along which Buckeye Knoll sits, was a highway connecting the rich coastal resources of the Gulf of Mexico to the interior of the continent.<\/p>\n
The populations who established themselves here were, in a geographic sense, at a crossroads \u2014 positioned to interact with coastal groups, with interior plateau groups, and potentially with populations from much farther afield.<\/p>\n
What Science Could Extract From The Bones<\/p>\n
<\/p>\n
Even without the specific genetic sequencing that would reveal the full genomic picture of the Texas Archaic populations, the bones themselves yield significant scientific information through techniques that do not require DNA.<\/p>\n
Stable isotope analysis \u2014 the measurement of ratios of different stable forms of carbon, nitrogen, and other elements \u2014 has been applied to both the Bering Sinkhole and Buckeye Knoll populations.<\/p>\n
The technique works because different food sources leave distinctive chemical signatures in the bone collagen of the people who eat them.<\/p>\n
Marine protein has a different isotopic signature than freshwater protein, which differs from terrestrial protein, which differs from plant foods.<\/p>\n
The results from the Texas sites revealed dietary patterns that changed over time.<\/p>\n
<\/p>\n
The earliest Buckeye Knoll individuals \u2014 those dating to around 8,500 years ago \u2014 showed elevated isotope values consistent with significant consumption of aquatic resources, likely freshwater fish and shellfish from the Guadalupe River and possibly marine resources from the nearby coast.<\/p>\n
Later populations at the same site showed a shift toward more terrestrial resources.<\/p>\n
This temporal shift in diet mirrors what is known from other lines of evidence about changing environmental conditions in southern Texas during the Archaic period.<\/p>\n
As the post-glacial climate continued its transition toward modern conditions, the productivity of the river systems may have changed.<\/p>\n
Populations that had relied heavily on aquatic resources were adapting their strategies.<\/p>\n
The strontium isotope analysis of tooth enamel \u2014 a technique that can indicate where an individual spent their childhood, because the strontium signature of enamel reflects the local geology of the food and water consumed during tooth formation \u2014 has the potential to reveal patterns of mobility and migration in ancient populations.<\/p>\n
<\/p>\n
Whether this analysis has been applied to the Texas cave and sinkhole populations in ways that have entered the published record is uncertain, but the technique represents one of the scientific tools that might illuminate questions about where these individuals came from and how far they traveled.<\/p>\n
Physical anthropological measurements and comparisons of skeletal morphology \u2014 the shape of skulls and other bones \u2014 have been used to assess the biological relationships between ancient Texas populations and other ancient American populations.<\/p>\n
These analyses are more limited than genetic comparisons, because skeletal morphology reflects the combined influence of genetics, development, and environment, and because the range of variation within populations often overlaps substantially between populations.<\/p>\n
But in the absence of genetic data, morphological comparisons have provided at least partial information about biological affinities.<\/p>\n
<\/p>\n
The Second Opening \u2014 A Different Question Entirely<\/p>\n
Here is where the story turns, around the middle of this account, and opens a fundamentally different question.<\/p>\n
So far, the narrative has been about discovery: the sinkholes found, the burials excavated, the bones analyzed, the lives reconstructed in partial outline.<\/p>\n
The scientific frame has been dominant \u2014 what can we learn, what can archaeology tell us, what does the ancient DNA question mean for understanding who these people were.<\/p>\n
But there is another frame, and it belongs to a different set of stakeholders.<\/p>\n
<\/p>\n
The ancient Texans buried at Bering Sinkhole and Buckeye Knoll are not merely scientific data.<\/p>\n
They are people \u2014 specific individuals who lived and died and were placed in sacred ground by communities that cared for them.<\/p>\n
They are ancestors \u2014 not necessarily the biological ancestors of any specific living individual who can be named, but ancestors in the broader sense: the predecessors of the human tradition in these landscapes, part of the continuous fabric of human life on this continent.<\/p>\n
The question of who has the right to determine what happens to those ancestors \u2014 and what science is and is not entitled to extract from their remains \u2014 is not a scientific question.<\/p>\n
<\/p>\n
It is a moral and political one, and the American legal system has tried to provide a framework for answering it.<\/p>\n
The Native American Graves Protection and Repatriation Act of 1990 was passed after decades of advocacy by Indigenous peoples who had watched their ancestors excavated from burial grounds, stored in museum collections, and used as objects of scientific study without the knowledge or consent of any living community connected to them.<\/p>\n
The law established that Native American human remains and associated cultural items held by federal agencies and institutions receiving federal funding must be inventoried, affiliated tribes must be consulted, and repatriation must occur upon tribal request when cultural affiliation can be established.<\/p>\n
At very ancient sites like Bering Sinkhole and Buckeye Knoll, the cultural affiliation question becomes genuinely difficult.<\/p>\n
<\/p>\n
No living tribe can claim biological descent from individuals who lived 7,000 to 8,500 years ago \u2014 not in any way that can be demonstrated through the currently available evidence.<\/p>\n
The language spoken by the ancient Texans is unknown.<\/p>\n
Their specific cultural practices are known only through archaeology.<\/p>\n
The communities they belonged to have no unbroken institutional continuity into the present.<\/p>\n
But the legal standard under NAGPRA \u2014 and under the Texas state laws that applied to sites like Bering Sinkhole \u2014 does not require proof of direct biological descent.<\/p>\n
It requires a reasonable determination that a contemporary group has cultural or biological affiliation with the ancient remains.<\/p>\n
And in the absence of clear evidence pointing away from a particular group, the law tends to default in favor of the geographically nearest federally recognized tribe.<\/p>\n
<\/p>\n
This legal framework has been criticized from multiple directions.<\/p>\n
Scientists have argued that it allows reburial of scientifically invaluable remains based on tribal affiliations that cannot be scientifically verified.<\/p>\n
Indigenous advocates have argued that it still places too much burden on tribes to prove affiliation and that it treats the ancestors of all Indigenous peoples as if their rightful custodians are determined by bureaucratic proximity rather than cultural connection.<\/p>\n
The Buckeye Knoll case became a particularly vivid example of these tensions.<\/p>\n
<\/p>\n
When the remains were reburied under the authority of the Lipan Apache Band of Texas, archaeologists noted in print that Apache speakers \u2014 who speak an Athapascan language whose ancestors almost certainly entered the southwestern United States much later than 8,500 years ago \u2014 are not plausibly the biological or cultural descendants of the Buckeye Knoll people.<\/p>\n
The cultural affiliation determination was driven by geographic proximity and legal default, not by demonstrable ancestry.<\/p>\n
The scientific loss was real.<\/p>\n
The remains that had already been studied were analyzed, but the study was not complete.<\/p>\n
Questions that might have been answered through additional analysis \u2014 particularly through ancient DNA analysis \u2014 cannot now be answered from the Buckeye Knoll physical collection.<\/p>\n
At the same time, the principle underlying the reburial \u2014 that Indigenous peoples have the right to determine the fate of the ancestors of the human communities that inhabited these lands before European arrival, even when specific descent cannot be demonstrated \u2014 is a principle that reflects genuine moral weight.<\/p>\n
<\/p>\n
The history of archaeological treatment of Indigenous remains in the United States is a history of dispossession that mirrors, in miniature, the broader dispossession of land and sovereignty.<\/p>\n
The people excavating ancient burials were operating within a cultural framework that treated Indigenous people and their ancestors as objects of scientific interest rather than as human beings with communities and traditions worthy of respect.<\/p>\n
NAGPRA was an attempt to correct that history.<\/p>\n
Its application at Buckeye Knoll was both legally defensible and scientifically costly.<\/p>\n
There is no clean resolution to this tension.<\/p>\n
It persists.<\/p>\n
<\/p>\n
The Deep Time Context \u2014 Native American Ancestry And The Founding Of A Continent<\/p>\n
The ancient Texas populations, and the questions their remains raise about ancient DNA and ancestry, are part of a much larger story that ancient genomics has been assembling over the past decade.<\/p>\n
Modern ancient DNA science has been able to sequence the genomes of ancient individuals from across the Americas, illuminating the population history of the hemisphere in ways that were unimaginable a generation ago.<\/p>\n
The picture that has emerged is of striking complexity.<\/p>\n
<\/p>\n
The founding populations of the Americas \u2014 the people who crossed from Asia into what is now Alaska during the terminal Pleistocene, as the great ice sheets were at their maximum extent and sea levels were at their lowest, exposing the Bering Land Bridge \u2014 were a distinct lineage that had diverged from other east Asian populations and spent a period of time in geographic isolation before spreading southward.<\/p>\n
During this isolation, which some researchers have called the Beringian standstill, the founding population accumulated genetic distinctiveness that sets it apart from any other human group on Earth.<\/p>\n
Once these founding populations began moving southward and spreading across the Americas, their genomes diversified.<\/p>\n
Regional populations developed genetic characteristics that differed from other regional populations, shaped by genetic drift \u2014 the random changes that occur when populations are separated and small \u2014 and by the specific selection pressures of different environments.<\/p>\n
But the fundamental story encoded in modern Native American genomes points to a primary origin in northeast Asia, a period of isolation in or near Beringia, and a relatively rapid spread southward once the continental ice sheets began their final retreat.<\/p>\n
<\/p>\n
The ancient DNA evidence from multiple sites across the Americas has broadly confirmed this picture while adding nuance and complexity.<\/p>\n
The Anzick Child, a 12,600-year-old individual from Montana whose genome was published in 2014, belongs to the lineage that gave rise to most modern Native Americans.<\/p>\n
The ancient individuals from Hoyo Negro in the Yucatan Peninsula, dated to roughly 12,000 years ago, also connect to the same founding lineage despite having cranial morphology that was initially interpreted as different from most modern Native Americans.<\/p>\n
The Spirit Cave mummy from Nevada, roughly 10,600 years old, similarly falls within the founding lineage that connects to modern Native Americans.<\/p>\n
<\/p>\n
The ancient Texas populations, based on what is known from physical anthropological analysis of skeletal morphology and from the broader genetic picture of early North Americans, likely fall within this same founding lineage.<\/p>\n
The early Archaic inhabitants of the Edwards Plateau and the coastal plain were almost certainly the biological ancestors \u2014 in a general population-level sense \u2014 of some of the Indigenous peoples of Texas, though the specific descent chains are not traceable through the millennia that separate the ancient and the modern.<\/p>\n
What The Burial Offerings Tell Us<\/p>\n
Among the most revealing finds from the Texas cave and sinkhole sites are the objects placed with the dead \u2014 the grave offerings that represent, in material form, the beliefs and relationships of the people who conducted the burials.<\/p>\n
Marine shells are the most striking of these offerings, precisely because they are so clearly out of place on the Edwards Plateau.<\/p>\n
<\/p>\n
Bering Sinkhole, in the limestone interior of the Hill Country, sits hundreds of miles from the nearest coast.<\/p>\n
The shells found with its ancient burials could only have arrived through long-distance trade or travel.<\/p>\n
The specific types of shells found in Texas Archaic burials have been analyzed to identify their geographic origins.<\/p>\n
Some come from the Gulf of Mexico coast of Texas.<\/p>\n
Others, more surprisingly, come from the Pacific coast \u2014 suggesting exchange networks that reached across the entire breadth of the continent.<\/p>\n
Shell was not merely a decorative material.<\/p>\n
<\/p>\n
In many Indigenous traditions, shell from the ocean carries specific cosmological significance \u2014 it comes from the great waters, from the boundary between the world and what lies beyond, and carries the power of that origin.<\/p>\n
Placing marine shell with the dead was not a casual choice.<\/p>\n
It was a deliberate statement about the relationship between the deceased and the broader cosmic order.<\/p>\n
The antler tools found in some Texas Archaic burials speak to the importance of deer in both the practical and symbolic life of these populations.<\/p>\n
Deer were among the most important sources of food and raw material in the post-Pleistocene Texas landscape.<\/p>\n
Antler was used for tool handles, for digging tools, for working stone and bone.<\/p>\n
<\/p>\n
But it also carried symbolic weight \u2014 deer appear in the rock art of the Texas Archaic as significant figures, and the relationship between human hunters and deer was understood in ways that extended beyond simple predator and prey.<\/p>\n
Stone artifacts \u2014 projectile points, knives, scrapers \u2014 appear in burial contexts as well.<\/p>\n
The specific types of projectile points found in burials can provide chronological information, because the forms of these tools changed over time in ways that archaeologists have documented and dated.<\/p>\n
But they also speak to the role of hunting in the identity of the deceased, and possibly to the role of certain types of tools as objects of social significance \u2014 weapons that carried prestige or meaning beyond their functional utility.<\/p>\n
What Ancient Texas Tells The Modern World<\/p>\n
<\/p>\n
The eight-thousand-five-hundred-year-old skeletons of Buckeye Knoll, and the seven-thousand-year-old burials of Bering Sinkhole, are not merely objects of historical curiosity.<\/p>\n
They are evidence of human continuity \u2014 of the fact that people have been living, adapting, and building complex societies in what is now Texas for a very long time.<\/p>\n
That continuity matters for several reasons.<\/p>\n
First, it complicates simplistic narratives about the Texas past.<\/p>\n
The narrative that Texas was empty wilderness before European settlement \u2014 that it was a landscape without significant human history \u2014 is corrected by the simple facts: tens of thousands of years of continuous human occupation, complex societies with long-distance trade networks, burial traditions that reflect sophisticated cosmological beliefs, cemeteries that demonstrate stable populations with established territorial relationships.<\/p>\n
The ancient Texans were not primitive people struggling to survive.<\/p>\n
<\/p>\n
They were skilled, sophisticated, and successful inhabitants of their landscapes \u2014 people who had built deep knowledge of the environments they lived in, who maintained complex social and trade relationships across the continent, and whose lives, while different from ours in every practical respect, reflected the same fundamental human qualities of social complexity, symbolic thinking, and care for the dead.<\/p>\n
Second, the DNA questions raised by these sites \u2014 whether or not they have been definitively answered \u2014 are questions that illuminate the deep history of all contemporary Native Americans.<\/p>\n
The founding populations that spread across the Americas in the terminal Pleistocene and early Holocene are the biological ancestors, in a population-level sense, of the Indigenous peoples who met European explorers and colonizers.<\/p>\n
Understanding those founding populations, and the diversity that emerged from them in the subsequent millennia, is part of understanding the full human history of the continent.<\/p>\n
<\/p>\n
Third, the story of what happened to the Buckeye Knoll remains \u2014 the controversy over repatriation, the competing claims of scientific priority and Indigenous sovereignty, the eventual reburial \u2014 is a story about how contemporary America is still working out its relationship with the human past.<\/p>\n
The NAGPRA framework represents a genuine attempt to recognize the rights of Indigenous peoples over the remains of their ancestors.<\/p>\n
Its application is often contested, frequently imperfect, and sometimes produces outcomes that are simultaneously legally defensible and scientifically costly.<\/p>\n
Understanding why that tension exists, and why it cannot easily be resolved, is part of understanding the broader history of how America has treated its Indigenous peoples.<\/p>\n
The Karst Landscape And Its Underground Archives<\/p>\n
<\/p>\n
The Edwards Plateau karst landscape, with its sinkholes and caves and solution cavities, continues to yield archaeological surprises.<\/p>\n
New sites are discovered as land is cleared, as erosion exposes buried materials, as researchers conduct systematic surveys of areas that have not previously been studied.<\/p>\n
Bering Sinkhole is not alone on the plateau.<\/p>\n
Other sinkholes across the region have been found to contain human remains, though most have been less thoroughly investigated.<\/p>\n
The pattern appears to be widespread: throughout the Edwards Plateau, natural limestone openings were used as burial places by Archaic-period hunter-gatherers, creating a scattered network of cave and sinkhole cemeteries whose full extent has not yet been determined.<\/p>\n
The preservation conditions vary.<\/p>\n
<\/p>\n
Some sinkholes have highly alkaline soils that rapidly destroy bone.<\/p>\n
Others, like Bering Sinkhole itself, offer somewhat better preservation through the stability of the underground environment.<\/p>\n
The preservation of DNA in these conditions is uncertain \u2014 the Texas climate works against ancient DNA survival \u2014 but even without DNA, the physical remains and the associated artifacts provide significant information about the people who used these spaces.<\/p>\n
The karst landscape of the plateau is, in this sense, still being read.<\/p>\n
Each new discovery adds to the picture of Archaic life on the plateau, filling in the outlines of populations that otherwise leave few visible traces on the landscape.<\/p>\n
<\/p>\n
The same is true for the coastal plain.<\/p>\n
The Guadalupe River corridor, where Buckeye Knoll was found, is an environment that has been occupied continuously from the early Archaic to the present.<\/p>\n
Other sites along the river may contain comparable material, though the environmental conditions of the floodplain \u2014 periodic flooding, sediment burial, exposure \u2014 make preservation more variable than in the limestone caves of the plateau.<\/p>\n
The Mystery That Persists<\/p>\n
Despite decades of archaeological investigation, and despite the significant analytical work done on sites like Bering Sinkhole and Buckeye Knoll before the reburial of the latter, key questions remain unanswered.<\/p>\n
<\/p>\n
The most fundamental is the direct genetic question: what were the genomes of the ancient Texas populations, and how do they compare to other ancient and modern Native American populations?<\/p>\n
At Buckeye Knoll, that question cannot now be answered from the physical remains, which have been reburied.<\/p>\n
Any future genomic analysis would require samples retained before reburial, if any were preserved in institutional collections, or would depend on the extraordinarily long shot of successful DNA extraction from environmental samples \u2014 sediments or other materials from the burial context.<\/p>\n
At Bering Sinkhole, the situation is less definitively closed.<\/p>\n
The site was fully excavated by archaeologists, and the materials recovered were analyzed and reported.<\/p>\n
<\/p>\n
Whether any samples were retained for potential future genetic analysis is unclear from the published literature.<\/p>\n
The underground environment of the sinkhole offered somewhat better DNA preservation conditions than open sites, but the warm Texas climate still presents challenges.<\/p>\n
The question of what ancient DNA analysis of the Texas Archaic populations would reveal remains genuinely open and genuinely important.<\/p>\n
The genetic picture of early Holocene North America is being assembled from sites across the hemisphere, and the Texas data \u2014 from one of the most environmentally significant and archaeologically productive regions of North America \u2014 would be a significant addition to that picture.<\/p>\n
A second unanswered question concerns the precise population dynamics of the Texas Archaic period.<\/p>\n
<\/p>\n
The shift in diet documented at Buckeye Knoll \u2014 from heavily aquatic in the early Archaic to more terrestrial in later periods \u2014 raises questions about whether this shift reflects changes in the same population adapting to changing conditions, or whether it reflects the replacement of one population by another as groups moved through the landscape.<\/p>\n
Without genetic data from multiple time periods within the same site, this question cannot be definitively answered.<\/p>\n
A third question, perhaps the most humanly immediate, is the question of continuity.<\/p>\n
Are the people buried at Bering Sinkhole and Buckeye Knoll the ancestors of any living human beings?<\/p>\n
In the strictly biological sense \u2014 are there living people who carry genetic material from those specific individuals? \u2014 the answer is almost certainly yes.<\/p>\n
In the eight thousand years since the earliest Buckeye Knoll burials, the populations of the Texas region have not been entirely replaced.<\/p>\n
<\/p>\n
Some genetic continuity from Early Archaic populations to later populations seems likely, even if the specific lines of descent cannot be traced.<\/p>\n
Whether that biological continuity constitutes meaningful cultural continuity \u2014 whether the descendants of the Archaic Texans carried forward traditions, beliefs, and identities that connect to those ancient burials \u2014 is a different question, and one that archaeology alone cannot answer.<\/p>\n
What The Cave Still Keeps<\/p>\n
Bering Sinkhole is still there, in the limestone hills of Kerr County.<\/p>\n
The oval opening in the rock, the shaft that descends into darkness, the chamber below \u2014 these features of the landscape have not changed since the archaeologists finished their work in 1991.<\/p>\n
The bones have been documented, analyzed, and reported.<\/p>\n
<\/p>\n
The artifacts have been studied and described.<\/p>\n
The scientific findings have been published and have entered the broader literature of American archaeology.<\/p>\n
What the sinkhole cannot give back is the living reality of the people who used it \u2014 the specific voices, the specific faces, the specific stories of the sixty-two individuals whose remains were found within it.<\/p>\n
Those are gone, as thoroughly as anything human ever disappears, preserved only in the most indirect and partial ways by the physical materials that outlasted the flesh and the memory and the community.<\/p>\n
But even the indirect and partial preservation is extraordinary, measured against what might have been known.<\/p>\n
<\/p>\n
Without the discovery of this sinkhole, without the archaeological investigations that followed, the people buried there would be as invisible as the vast majority of ancient Texans \u2014 people who lived and died and left no recoverable trace.<\/p>\n
The sinkhole made them visible, in however partial a way.<\/p>\n
The excavations added them to the human record.<\/p>\n
The analyses added them to the scientific understanding of who lived in Texas eight and seven thousand years ago.<\/p>\n
And the reburial, at least for the Buckeye Knoll population, returned them to the ground according to a legal and ethical framework that recognized their right not to be indefinitely available for scientific inspection.<\/p>\n
Both things \u2014 the scientific recovery and the return \u2014 are part of the full story.<\/p>\n
<\/p>\n
The Living Communities And The Distant Past<\/p>\n
The contemporary Indigenous peoples of Texas and the surrounding region \u2014 the federally recognized tribes whose ancestors inhabited these landscapes \u2014 have their own understandings of who they are and where they come from.<\/p>\n
Those understandings are encoded in oral traditions, in ceremonial practices, in the specific relationships to specific places that define tribal identity.<\/p>\n
The relationship between those living traditions and the archaeological record of the ancient Texans is complex and contested.<\/p>\n
Scientific evidence can identify population patterns, genetic relationships, dietary practices, burial traditions, and trade networks.<\/p>\n
<\/p>\n
It cannot recover language, ceremony, belief, or the specific social structures through which identity was transmitted and maintained.<\/p>\n
The ancient Texans buried at Bering Sinkhole and Buckeye Knoll were embedded in communities that had their own traditions, their own understandings of the cosmos, their own forms of social organization.<\/p>\n
Those traditions have not been preserved \u2014 not in any way that science can directly read.<\/p>\n
They are inferred, imperfectly, from material traces.<\/p>\n
What is clear is that the human history of Texas is far deeper, far more complex, and far more continuous than the histories that begin with European arrival.<\/p>\n
The ancient cemeteries of the plateau and the coastal plain document thousands of years of human life in these landscapes \u2014 of people who built knowledge of their environments across generations, who maintained connections across the continent, who cared for their dead with ritual attention.<\/p>\n
<\/p>\n
That history belongs, in the most fundamental sense, to the Indigenous peoples of the region \u2014 not because a legal framework requires that assertion, but because the simple fact of continuous occupation makes it so.<\/p>\n
The question of how to honor that history, while also pursuing the scientific understanding that benefits everyone, is one that American archaeology and American law are still working out.<\/p>\n
The sinkholes hold their dead.<\/p>\n
The limestone keeps its secrets, yielding them up slowly to those who look carefully enough.<\/p>\n
And the questions that the ancient bones raise \u2014 about who was here, how long they were here, where they came from, and what their relationship is to the living peoples of today \u2014 are questions that science is still learning how to ask, and still in the process of answering.<\/p>\n
What Remains Unknown \u2014 And Why It Matters<\/p>\n
<\/p>\n
The 8,500-year-old individuals from the earliest Buckeye Knoll burials, and the Early Archaic population of Bering Sinkhole, represent a period of North American prehistory that is still poorly understood.<\/p>\n
The genetic picture of the Americas at eight to ten thousand years ago is incomplete.<\/p>\n
The demography of the post-Pleistocene Americas \u2014 how many people were here, how they were distributed, how they interacted \u2014 is sketched in broad outlines that detailed studies of specific sites like those in Texas have only begun to fill in.<\/p>\n
The specific ancient DNA mystery \u2014 can we read the genomes of the Texas Archaic populations, and what would those genomes tell us about the founding and diversification of Native American populations \u2014 remains largely unresolved.<\/p>\n
The scientific tools to ask and answer these questions now exist in ways they did not when the Buckeye Knoll materials were reburied in 2006.<\/p>\n
<\/p>\n
The physical samples to which those tools could be applied are, at least for Buckeye Knoll, no longer accessible.<\/p>\n
This is one of the specific costs of the current framework for managing ancient Native American remains.<\/p>\n
It is a cost that some find acceptable \u2014 because the principles behind repatriation are important and worth the scientific sacrifice \u2014 and some find unacceptable, because the information lost is irreplaceable.<\/p>\n
The argument will continue, and its resolution, if it comes, will depend on the development of frameworks that find ways to honor both the scientific value of these ancient populations and the legitimate claims of Indigenous peoples to determine the fate of their ancestors.<\/p>\n
The caves and sinkholes of the Texas limestone country are still out there.<\/p>\n
<\/p>\n
New sites are still being found.<\/p>\n
The people buried in them are still being discovered by accident, by construction projects, by archaeologists conducting systematic surveys.<\/p>\n
Each discovery adds something to the human record \u2014 and each one raises the same questions about who they were, where they came from, how they lived, and who, if anyone, speaks for them today.<\/p>\n
Those are not questions that have simple answers.<\/p>\n
But they are questions that matter \u2014 not just to archaeologists, not just to geneticists, not just to the Indigenous communities whose ancestors are in those bones, but to everyone who is trying to understand the full human history of this continent.<\/p>\n
<\/p>\n
The 8,500-year-old skeletons found in the Texas cave and sinkhole systems are part of that history.<\/p>\n
Their DNA mystery, however it is eventually resolved or left unresolved, is part of the story of who was here before us, and how far back the human story of America actually goes.<\/p>\n
It goes back much further than most people know.<\/p>\n
And the caves are still keeping their secrets, for anyone patient enough to descend into the limestone dark and look.<\/p>\n
How Radiocarbon Dating Reads The Past \u2014 And What It Confirmed In Texas<\/p>\n
<\/p>\n
The claim that these ancient Texas remains are 7,000 to 8,500 years old is not guesswork.<\/p>\n
It rests on a specific scientific technique \u2014 radiocarbon dating \u2014 that has become one of the most powerful tools in the archaeologist’s repertoire.<\/p>\n
Every living organism absorbs carbon from its environment.<\/p>\n
Most of that carbon is the stable, non-radioactive form: carbon-12.<\/p>\n
But a small fraction \u2014 about one part per trillion in the modern atmosphere \u2014 is carbon-14, a radioactive isotope produced in the upper atmosphere when cosmic rays strike nitrogen atoms.<\/p>\n
Living organisms, because they are constantly incorporating new carbon from food, air, and water, maintain a relatively constant ratio of carbon-14 to carbon-12 throughout their lives.<\/p>\n
<\/p>\n
When an organism dies, it stops incorporating new carbon.<\/p>\n
The carbon-14 already present in its tissues begins to decay at a known, constant rate: every 5,730 years, half of the remaining carbon-14 disappears.<\/p>\n
This decay clock \u2014 ticking reliably since the organism’s death \u2014 can be read by measuring the ratio of carbon-14 to carbon-12 in ancient organic material.<\/p>\n
The lower the ratio, the older the material.<\/p>\n
For the human remains at sites like Buckeye Knoll, the organic material most commonly used for radiocarbon dating is either bone collagen (the protein matrix that makes up much of bone) or tooth collagen.<\/p>\n
Teeth are often preferred because the enamel and the proteins within the root are relatively well sealed from external contamination.<\/p>\n
<\/p>\n
Accelerator mass spectrometry, or AMS dating, allows researchers to measure carbon-14 directly on very small samples \u2014 often just a few milligrams of material \u2014 with high precision.<\/p>\n
The dates obtained from Buckeye Knoll were not based on a single sample from a single individual.<\/p>\n
They were produced from multiple individuals, using multiple samples, generating a distribution of dates that collectively span from approximately 8,500 before present to approximately 500 before present.<\/p>\n
The oldest dates, from tooth and bone collagen samples from the earliest burials, consistently place those individuals in the early Holocene \u2014 the geological epoch that began approximately 11,700 years ago when the last great ice sheets were in final retreat.<\/p>\n
Calibration matters here.<\/p>\n
<\/p>\n
Radiocarbon dates are not the same as calendar dates, because the production of carbon-14 in the atmosphere has not been constant over time.<\/p>\n
The atmospheric production rate varies with solar activity and other factors.<\/p>\n
To convert a radiocarbon date into a calendar year, scientists use calibration curves derived from independently dated materials \u2014 primarily tree rings, which can be counted precisely and whose carbon content can be measured year by year going back thousands of years.<\/p>\n
The calibrated dates for the earliest Buckeye Knoll burials place them at approximately 8,500 calendar years before present \u2014 that is, approximately 6,500 years before the common era.<\/p>\n
To put this in human terms: these individuals were buried approximately 2,000 years before Stonehenge was built in England, roughly 1,500 years before the first Egyptian pyramids rose from the Nile Valley.<\/p>\n
<\/p>\n
The Stone Tools That Helped Fix The Time<\/p>\n
Radiocarbon dating provides the most precise chronological information, but it is not the only tool archaeologists use to understand when a site was occupied.<\/p>\n
Stone tools \u2014 projectile points, knives, scrapers, and other chipped stone artifacts \u2014 change in form over time in ways that archaeologists have documented extensively, creating a typological sequence that can serve as a rough chronological guide.<\/p>\n
The Texas Archaic sequence of projectile point types is well established.<\/p>\n
Different point forms appear and disappear over time, some lasting only a few centuries, others persisting for longer periods.<\/p>\n
<\/p>\n
By identifying the point types found in association with burials or in the layers of sediment overlying a site, archaeologists can often assign a rough age to a deposit even before radiocarbon dates are available.<\/p>\n
The projectile point assemblages from Bering Sinkhole and other Early Archaic Texas sites show the forms that have been dated elsewhere to the early Holocene \u2014 the time just after the great Pleistocene extinctions, when the people of the Texas region were making the transition from the megafauna-hunting lifestyles of the Paleoindian period to the diversified subsistence economies of the Archaic.<\/p>\n
These stone tools were not merely practical objects.<\/p>\n
They were the products of considerable skill.<\/p>\n
<\/p>\n
Knapping \u2014 the controlled removal of flakes from a piece of stone to shape it into a desired form \u2014 requires extensive practice, detailed knowledge of how different stones respond to percussion and pressure, and fine motor control developed over years of work.<\/p>\n
A well-made projectile point represents hours of skilled work and embodies a tradition of technical knowledge transmitted from experienced makers to beginners.<\/p>\n
The quality of the stone tools found in burial contexts at sites like Bering Sinkhole suggests that some of these objects were considered special \u2014 that the finest examples of the tool-maker’s art were sometimes selected for placement with the dead, rather than the worn or broken tools that represented everyday use.<\/p>\n
What The Diet Revealed About The Economy<\/p>\n
<\/p>\n
The stable isotope data from the ancient Texas populations does more than identify specific foods eaten by individuals.<\/p>\n
It reveals the structure of an economy.<\/p>\n
An economy, in the anthropological sense, is not just about money or trade.<\/p>\n
It is about how a society organizes the production and distribution of the resources it needs.<\/p>\n
For Archaic hunter-gatherers in Texas, the economy was organized around the systematic exploitation of the resources that different environments offered \u2014 and the isotope data from places like Buckeye Knoll reveals how that exploitation was structured in time and space.<\/p>\n
The elevated aquatic isotope signatures in the earliest Buckeye Knoll individuals suggest that the population of the lower Guadalupe River in the early Archaic relied substantially on fish, freshwater mussels, and potentially coastal marine resources.<\/p>\n
<\/p>\n
This is not a simple observation about personal preference.<\/p>\n
It reflects a seasonal economy in which river and coast resources were central, in which the technology of fishing and shellfish harvesting was important, and in which the ecology of the lower Guadalupe corridor was being systematically exploited.<\/p>\n
The archaeological record from Early Archaic Texas sites confirms this picture.<\/p>\n
Shell middens \u2014 enormous accumulations of freshwater mussel shells, representing thousands of processing events \u2014 are common features at Archaic sites along the major rivers of southern and central Texas.<\/p>\n
These middens document not just what people ate but how they ate it: in recurring camps at favored locations, returning season after season to the same sites where resources were reliable.<\/p>\n
<\/p>\n
The shift toward more terrestrial resources in later Buckeye Knoll populations might reflect several things.<\/p>\n
Population growth may have put more pressure on the most productive aquatic resources, driving groups to increase their reliance on terrestrial game.<\/p>\n
Climate change may have altered the productivity of the river system.<\/p>\n
Or the shift may reflect changes in where groups were spending their time \u2014 if later populations were ranging more widely across the uplands and less focused on the river corridor, their diet would naturally reflect more terrestrial resources.<\/p>\n
The isotope record cannot by itself distinguish among these possibilities.<\/p>\n
<\/p>\n
But combined with other lines of evidence \u2014 changes in artifact assemblages, in the distribution of sites, in the types of faunal remains found at excavated sites \u2014 it contributes to a picture that archaeologists are gradually assembling.<\/p>\n
The Regional Networks \u2014 Where The Marine Shells Came From<\/p>\n
The marine shells found in Texas Archaic burials hundreds of miles from the coast are one of the most evocative pieces of evidence for the long-distance exchange networks that connected ancient North American populations.<\/p>\n
These shells were not gathered casually.<\/p>\n
To reach the Edwards Plateau from the Gulf of Mexico coast, a shell or shell ornament would have had to travel hundreds of miles \u2014 either carried directly by travelers making the journey, or passed through a chain of exchanges between intermediate groups.<\/p>\n
The maintenance of such networks requires investment: in travel, in the goods exchanged along the way, in the relationships that make exchange possible.<\/p>\n
<\/p>\n
Archaeological research on the distribution of exotic materials in ancient sites can sometimes trace the routes of exchange.<\/p>\n
When a specific type of shell found at an inland site matches the chemical signature of shells from a specific coastal location \u2014 something that can sometimes be determined through trace element analysis \u2014 it identifies both the origin of the material and, implicitly, the existence of a connection between the inland site and that coastal location.<\/p>\n
The Olivella shells found at some Texas Archaic sites are a particularly interesting case.<\/p>\n
Olivella is a genus of small marine snail found on both the Pacific and Gulf coasts.<\/p>\n
<\/p>\n
Some of the Olivella shells found in interior Texas sites have chemical signatures consistent with Pacific coast sources \u2014 suggesting that exchange networks extended not just from the Gulf coast to the interior, but from the Pacific coast across the entire breadth of the continent.<\/p>\n
Pacific shells in central Texas, eight thousand years ago.<\/p>\n
This is not a detail that fits neatly into popular images of Archaic hunter-gatherers as isolated bands of people barely surviving on the margins of existence.<\/p>\n
It speaks, instead, to a world of connection \u2014 a continent crisscrossed by routes of travel and exchange, maintained by relationships between groups that extended across enormous distances.<\/p>\n
The Edwards Plateau \u2014 A Landscape Of Archaeological Memory<\/p>\n
<\/p>\n
The Edwards Plateau is not just a landscape of sinkholes and archaeological sites.<\/p>\n
It is a landscape of memory \u2014 a place where the human past is written into the rock in ways that sometimes surprise and always illuminate.<\/p>\n
Across the plateau, in the limestone shelters that dot the canyon walls and cliff faces, the rock art traditions of Archaic and later populations have left painted figures in red, black, and occasionally other colors: geometric designs, human and animal figures, shamanic images, pictographs that have resisted full interpretation for generations.<\/p>\n
The most elaborate rock art in the Texas region appears in the Lower Pecos Canyonlands \u2014 the canyon system of the Pecos River and the Devils River where they join the Rio Grande at the Texas-Mexico border, roughly a hundred miles southwest of the Edwards Plateau proper.<\/p>\n
<\/p>\n
The Pecos River Style pictographs of this region are among the most sophisticated prehistoric paintings in North America: large-scale figures of shamans, animals, and spiritual beings, painted in polychrome colors on shelter walls, some reaching eight or ten feet in height.<\/p>\n
These paintings were made during roughly the same Archaic period that produced the burials at Bering Sinkhole and Buckeye Knoll \u2014 the same several-thousand-year span when the hunter-gatherers of the Texas region were building their complex adaptations to post-Pleistocene landscapes.<\/p>\n
The people who left their dead in sinkholes on the plateau may well have been the same people, or cultural relatives of the same people, who painted those extraordinary images on the canyon walls of the Lower Pecos.<\/p>\n
The connection between the two kinds of evidence \u2014 the burial remains and the rock art \u2014 is not established with certainty.<\/p>\n
<\/p>\n
The Pecos River Style people and the plateau sinkhole burial people may have been related populations with similar cultural traditions, or they may have been distinct groups who happened to inhabit adjacent territories.<\/p>\n
The archaeological evidence can establish roughly contemporaneous occupation of neighboring regions; it cannot yet demonstrate the specific cultural relationships between those regions.<\/p>\n
What both the burials and the rock art make clear is that the Archaic populations of Texas were not people without complex spiritual and social lives.<\/p>\n
They were people who built cemeteries and maintained them for thousands of years.<\/p>\n
They were people who painted elaborate visions on canyon walls.<\/p>\n
<\/p>\n
They were people who traded for marine shells from distant coasts and placed those shells with their dead.<\/p>\n
They were people whose lives were organized by belief systems and social structures that we can only partially glimpse through the archaeological evidence they left behind.<\/p>\n
The Archaic Transition \u2014 When Texas Changed<\/p>\n
The period between approximately 10,000 and 6,000 years ago \u2014 the early to middle Archaic \u2014 was a time of significant change in Texas.<\/p>\n
The Pleistocene had ended.<\/p>\n
The great ice sheets were gone.<\/p>\n
<\/p>\n
The megafauna \u2014 the animals that had shaped the environment and the subsistence strategies of the Paleoindian period \u2014 were mostly extinct.<\/p>\n
The climate was shifting toward something closer to its modern pattern, though the transition was not smooth or uniform.<\/p>\n
In this transformed world, the people of Texas were making a fundamental shift in how they lived.<\/p>\n
The specialized megafauna-hunting strategies of the Paleoindian period \u2014 optimized for pursuing mammoth, horse, giant bison, and other large animals across open parkland \u2014 were being replaced by the diversified, flexible strategies of the Archaic.<\/p>\n
People were becoming experts at exploiting a wider range of resources: deer, pronghorn, smaller game, fish, shellfish, plant foods, and the underground storage organs of various plant species that they learned to process in earth ovens.<\/p>\n
<\/p>\n
This transition was not abrupt.<\/p>\n
It was a gradual shift, driven by both the disappearance of the megafauna and the changing availability of plant and animal resources as the climate warmed.<\/p>\n
The populations of the Texas region adapted, and in adapting, they built the knowledge systems and social structures that would characterize the Archaic period for the next several thousand years.<\/p>\n
The early Archaic populations represented at Buckeye Knoll \u2014 the 8,500-year-old burials that represent some of the earliest well-documented human remains from this period in Texas \u2014 were people in the middle of this transition.<\/p>\n
They were drawing on aquatic resources that the Guadalupe River corridor offered in abundance.<\/p>\n
<\/p>\n
They were part of exchange networks that extended across the continent.<\/p>\n
They were burying their dead with care and ritual attention that reflects a sophisticated cosmological understanding.<\/p>\n
They were also, in some ways, managing resources that were still in flux.<\/p>\n
The ecosystems they inhabited were stabilizing after the Pleistocene collapse, but they were not yet in the stable configurations that would characterize the middle and late Archaic.<\/p>\n
The specific balance of resources available \u2014 the populations of deer, the productivity of the rivers, the distribution of plant food species \u2014 was still shifting.<\/p>\n
The people who navigated this transition successfully \u2014 the populations that survived and persisted through the early Archaic \u2014 were the ancestors, in the population-level sense, of everyone who came after them in these landscapes.<\/p>\n
<\/p>\n
Their adaptability, their knowledge, and their social networks were the foundations on which all subsequent human history in Texas was built.<\/p>\n
The Problem Of Preservation And What It Means For The Future<\/p>\n
One of the fundamental challenges of studying ancient Texas populations is the problem of preservation \u2014 the question of which evidence survives and which does not.<\/p>\n
The limestone sinkholes of the Edwards Plateau offer, under some conditions, better preservation than open sites.<\/p>\n
The underground environment has more constant temperature and humidity, slowing the decay of organic materials.<\/p>\n
The alkalinity of the limestone can sometimes help preserve bone, though it can also in other cases accelerate dissolution.<\/p>\n
<\/p>\n
The specific conditions within each sinkhole determine whether the organic remains within it survive long enough to be recovered and studied.<\/p>\n
Bering Sinkhole’s remains were described as better preserved than those from many other Texas sinkhole sites, where the bone preservation was noted as often poor.<\/p>\n
The conditions within Bering Sinkhole \u2014 its specific combination of soil chemistry, temperature, humidity, and depth \u2014 were favorable enough to preserve skeletal remains over thousands of years.<\/p>\n
Buckeye Knoll’s open site conditions were different.<\/p>\n
The floodplain setting, with periodic flooding and sediment deposition, is a more challenging preservation environment in some ways, though the waterlogged conditions of some floodplain sites can actually preserve organic materials well.<\/p>\n
The Guadalupe River floodplain at Buckeye Knoll apparently offered sufficient preservation to maintain bone collagen for radiocarbon dating and stable isotope analysis \u2014 a demanding standard.<\/p>\n
<\/p>\n
The prospects for ancient DNA preservation in Texas are, as noted earlier, generally poor because of the warm climate.<\/p>\n
But the field of ancient DNA science is advancing rapidly.<\/p>\n
New methods for extracting and analyzing degraded DNA have been developed that can recover genetic information from samples that would have yielded nothing a decade ago.<\/p>\n
Sediment DNA \u2014 genetic material preserved in cave soils and sediments rather than in bones \u2014 is increasingly being recovered from cave environments around the world.<\/p>\n
The possibility exists that future researchers, with methods not yet developed or deployed, might be able to recover genetic information from the sediments of Texas caves and sinkholes even where physical remains are no longer available.<\/p>\n
<\/p>\n
Whether such methods would be applicable to the specific conditions of Texas sites, and whether the communities with authority over those sites would permit such research, are open questions.<\/p>\n
What is certain is that the field is changing.<\/p>\n
The questions that seem unanswerable today may have answers in a decade or two decades.<\/p>\n
The challenge is ensuring that the physical and contextual evidence needed to apply those future methods is preserved and documented in the interim.<\/p>\n
The Connection To Contemporary Indigenous Life<\/p>\n
The ancient populations of Texas are not merely historical curiosities.<\/p>\n
They are the deep-time ancestors of the Indigenous peoples who have lived in these landscapes continuously \u2014 through the arrival of Europeans, through the colonial disruptions that followed, through the dispossession and forced relocations of the nineteenth and twentieth centuries.<\/p>\n
<\/p>\n
The contemporary tribes of Texas and the surrounding region \u2014 the federally recognized nations with traditional connections to these landscapes \u2014 maintain their own understandings of their histories and their connections to the land.<\/p>\n
Those understandings are encoded in oral traditions, in ceremonial practice, in the specific knowledge of particular places that constitutes the living culture of a people with roots in this land.<\/p>\n
The archaeological record and the oral traditions do not always align in ways that are simple or comfortable.<\/p>\n
The archaeological evidence for 8,500 years of continuous human presence in the Guadalupe corridor, or 7,000 years of cemetery use at a single sinkhole on the Edwards Plateau, is both a confirmation and a complication of tribal identity narratives \u2014 a confirmation that the Indigenous connection to these landscapes is genuinely ancient, and a complication in that the specific populations documented archaeologically may not be traceable through an unbroken line to any contemporary tribal nation.<\/p>\n
This is not an accusation.<\/p>\n
<\/p>\n
It is simply an acknowledgment of the complexity of human history over long time scales.<\/p>\n
Populations move.<\/p>\n
Languages change.<\/p>\n
Cultural traditions evolve and transform.<\/p>\n
A group that today identifies as connected to the Guadalupe River valley may be connected to that landscape through a history that involves multiple population movements, cultural transformations, and shifts in political organization over the past eight thousand years.<\/p>\n
What the archaeological evidence establishes is that people have been living in these landscapes for an extraordinarily long time \u2014 that the Indigenous connection to Texas is not a recent phenomenon but a deep-rooted reality of the continent’s human geography.<\/p>\n
That is both scientifically significant and culturally important.<\/p>\n
<\/p>\n
The Bones In The Dark<\/p>\n
There is something irreducibly powerful about the fact that the ancient Texans chose to place their dead in the dark places of the earth.<\/p>\n
The sinkholes of the Edwards Plateau \u2014 vertical shafts dropping from the sunlit surface into the limestone interior, into cave chambers where no light penetrates \u2014 are not randomly selected burial locations.<\/p>\n
They were chosen, deliberately and consistently, over generations.<\/p>\n
The communities of the plateau understood these openings in the ground as passages to another realm \u2014 the realm of the dead, the world of the ancestors, the underworld that lies beneath the living surface of the earth.<\/p>\n
<\/p>\n
This cosmological understanding \u2014 that the earth contains a world of the dead, accessible through natural openings in the limestone, sacred and dangerous and connected to the ancestral powers \u2014 is not unique to the Texas plateau.<\/p>\n
Similar beliefs are documented among Native peoples across the Americas and across the world.<\/p>\n
But in Texas, this belief expressed itself with particular intensity and persistence in the use of limestone sinkholes as cemeteries \u2014 a practice that continued for thousands of years at Bering Sinkhole, maintained generation after generation by people who understood the dark shafts as sacred passages.<\/p>\n
When the landowner descended into Bering Sinkhole and found the skulls, he was, in a sense, entering that sacred passage himself \u2014 finding, in the darkness underground, the accumulated dead of a tradition he could not have imagined persisting for five and a half thousand years.<\/p>\n
The archaeologists who followed him documented what was there.<\/p>\n
<\/p>\n
The physical anthropologists measured and analyzed the bones.<\/p>\n
The isotope chemists read the dietary records encoded in the collagen.<\/p>\n
The radiocarbon specialists dated the collagen and fixed the burials in time.<\/p>\n
All of this is important.<\/p>\n
All of it adds to the human knowledge of who was here, how long they were here, and what their lives were like.<\/p>\n
But none of it fully explains why, for 5,500 years, the people of the Edwards Plateau brought their dead to this particular shaft in the limestone.<\/p>\n
What belief sustained that tradition across two hundred generations?<\/p>\n
<\/p>\n
What understanding of the dead and their relationship to the living made this specific dark place the right one for the passage from one world to the next?<\/p>\n
Those are not questions that archaeology can answer.<\/p>\n
They belong to the interior life of the ancient Texans \u2014 to their experience of loss, of continuity, of the cosmos \u2014 and that interior life has not been preserved in the bones or the artifacts.<\/p>\n
It persists only in the fact of the practice itself: the repeated, generation-after-generation return to the same limestone shaft, the careful placement of the dead within it, the offerings laid alongside them.<\/p>\n
Someone cared.<\/p>\n
<\/p>\n
Enough people cared, for long enough, to sustain a tradition for fifty-five centuries.<\/p>\n
The evidence of that caring is still there, in the limestone hills of Kerr County, in the published reports that document what was found there, and in the memory of a discovery that opened a window \u2014 however partial, however imperfect \u2014 onto the deep human history of the Texas Hill Country.<\/p>\n
The Archive That Cannot Be Closed<\/p>\n
Scientific knowledge, once created, is not entirely reversible.<\/p>\n
The reburial of Buckeye Knoll in 2006 closed physical access to those specific remains.<\/p>\n
<\/p>\n
The future DNA analyses that might have been conducted, the future isotope studies that might have refined the dietary picture, the future methods that might have illuminated aspects of those ancient lives that current science cannot reach \u2014 all of those possibilities were ended by the reinterment.<\/p>\n
But the archive of what was learned before the reburial has not been destroyed.<\/p>\n
The physical anthropological measurements and observations are published and available.<\/p>\n
The stable isotope data is in the scientific literature.<\/p>\n
The artifact descriptions and photographs are in the record.<\/p>\n
The radiocarbon dates are confirmed and cannot be undated.<\/p>\n
This archive is not as complete as it could be.<\/p>\n
Studies that might have been conducted were not, because the scientific community did not have unlimited access and unlimited time before the reburial.<\/p>\n
<\/p>\n
Analyses that are now routinely performed \u2014 certain types of isotope measurements, for instance, or genomic sequencing \u2014 were either unavailable or not applied to these specific remains.<\/p>\n
But incomplete archives are still archives.<\/p>\n
The Buckeye Knoll record, as it exists in the published literature and in the photographic archives collected before reburial, remains one of the most significant datasets on Early Archaic Texas populations available anywhere.<\/p>\n
Future researchers will continue to mine it for insights that the original investigators may not have anticipated.<\/p>\n
The same is true of Bering Sinkhole.<\/p>\n
The Bement analysis of the sinkhole population, published through the University of Texas Press, remains a foundational reference for understanding Archaic-period mortuary practices and population biology on the Edwards Plateau.<\/p>\n
<\/p>\n
The specific findings \u2014 the demographic structure of the burial population, the evidence of diet and physical activity, the extraordinary lithopedion \u2014 are part of the permanent scientific record.<\/p>\n
These sites contributed what they could contribute, under the specific conditions and constraints of their investigation.<\/p>\n
The knowledge they generated has been preserved, even when the physical remains themselves have been returned to the ground.<\/p>\n
That is the nature of the archaeological enterprise: to extract knowledge from physical evidence before that evidence disappears \u2014 through decay, through development, through the legitimate decisions of communities about the treatment of their ancestors.<\/p>\n
The archaeologists who worked at Bering Sinkhole and Buckeye Knoll were racing against time and against competing claims, and they succeeded, partially, in extracting information that would otherwise have been lost entirely.<\/p>\n
<\/p>\n
The caves and sinkholes of Texas are still out there.<\/p>\n
The limestone is still keeping its secrets.<\/p>\n
And the people who were buried there \u2014 eight thousand years ago, seven thousand years ago, five thousand years ago, two thousand years ago \u2014 are still, in however partial and imperfect a way, speaking to us through the evidence they left behind.<\/p>\n
We just have to be patient and careful enough to listen.<\/p>\n
Why The Texas Sites Matter To The Broader Story Of North America<\/p>\n
The archaeological discoveries in the sinkholes and caves of Texas are not local stories.<\/p>\n
<\/p>\n
They are part of a continental story about how the Americas were peopled, how those founding populations diversified and adapted across thousands of years, and what the deep human history of North America actually looks like when examined with the tools that modern science provides.<\/p>\n
The Americas were the last major landmasses on Earth to be permanently settled by human beings.<\/p>\n
When the first populations crossed from northeast Asia into what is now Alaska \u2014 sometime before 15,000 years ago, and possibly considerably earlier \u2014 they were entering a continent that had never before known Homo sapiens.<\/p>\n
The ecological disruptions that followed, including the extinction of many megafauna species, set the stage for the long Archaic period during which the populations of the Americas developed the varied, sophisticated adaptations that characterized human life across the continent before European arrival.<\/p>\n
Texas sits at a critical geographic node in this story.<\/p>\n
<\/p>\n
The Gulf Coastal Plain, the Edwards Plateau, the river corridors connecting interior and coast \u2014 these are not peripheral landscapes.<\/p>\n
They are central to the major environmental zones of North America: the interface between the eastern woodlands and the western grasslands, the connection between tropical and temperate environments, the boundary between the humid and the arid.<\/p>\n
Populations moving through Texas were populations navigating between different worlds.<\/p>\n
The ancient Texans of the Early Archaic were not isolated actors.<\/p>\n
They were part of the continental web of relationships \u2014 exchange, kinship, shared cultural traditions \u2014 that connected populations across the hemisphere.<\/p>\n
The marine shells in their burials reflect this connection.<\/p>\n
<\/p>\n
The stone tools made from materials obtained at a distance reflect it.<\/p>\n
The patterns of diet and mobility encoded in their isotope records reflect it.<\/p>\n
Understanding what these populations were doing in Texas during the early Holocene helps fill in a crucial piece of the North American picture.<\/p>\n
Between the well-documented Paleoindian record of megafauna hunters on the Great Plains and in the eastern woodlands, and the increasingly complex societies of the later Archaic and Woodland periods, the early Archaic represents a transitional phase that is poorly sampled and poorly understood across much of the continent.<\/p>\n
Buckeye Knoll and Bering Sinkhole are among the best-documented examples of this transitional phase anywhere in North America.<\/p>\n
<\/p>\n
Their contribution to the broader continental picture is, for this reason, disproportionate to their geographic scale.<\/p>\n
The Archaeological Record Beyond Texas<\/p>\n
To appreciate the significance of the Texas discoveries, it helps to know what the comparable record looks like elsewhere in North America.<\/p>\n
The Florida site of Windover, excavated in the 1980s, produced one of the largest Early Archaic skeletal populations in the eastern hemisphere \u2014 approximately 168 individuals, buried in the peat of an ancient pond at dates ranging from roughly 7,000 to 8,000 years ago.<\/p>\n
The pond’s waterlogged conditions preserved not just bone but soft tissues, brain matter, and even clothing fibers.<\/p>\n
<\/p>\n
DNA was successfully extracted from some of the Windover individuals \u2014 a remarkable scientific achievement that provided the first genetic data from Early Archaic North Americans.<\/p>\n
The Windover data showed that the early Floridians belonged to mitochondrial haplogroups that are found in modern Native American populations, confirming the genetic continuity between the ancient populations of the East and the Indigenous peoples who are their descendants.<\/p>\n
But it also showed genetic characteristics that differed from modern populations in the region \u2014 suggesting that the populations of 7,000 to 8,000 years ago were not simply the direct ancestors of the historically documented tribes of Florida, but were part of a more complex population history involving multiple migrations, population replacements, and genetic drift over the intervening millennia.<\/p>\n
The Carrier Mills site in southern Illinois \u2014 the third member of the trio of major Early Archaic North American cemeteries that Buckeye Knoll completed \u2014 is a late Archaic site along the Saline River, with burials dating from roughly 5,000 to 2,500 years before present.<\/p>\n
<\/p>\n
Like the Texas sites, it documents a population using a specific location as a cemetery over a long period, accompanied by offerings that reflect both practical and symbolic concerns.<\/p>\n
The Spirit Cave mummy from Nevada, preserved in the dry conditions of the Great Basin interior, provides a single individual from roughly 10,600 years before present whose genome has been fully sequenced.<\/p>\n
The Spirit Cave individual belongs to a lineage that is ancestral to some modern Native American populations, consistent with the picture of genetic continuity across the Holocene.<\/p>\n
But the Spirit Cave individual also shows a cranial morphology that was initially described as differing from modern Native Americans \u2014 a finding that sparked the debate about whether the earliest Americans were biologically more diverse than their modern descendants.<\/p>\n
<\/p>\n
These comparisons illuminate what is known and what remains unknown about the ancient Texas populations.<\/p>\n
They are part of the same continental story, but each is a distinct chapter \u2014 shaped by specific geographic and environmental conditions, specific population histories, specific decisions made by the people who left the evidence.<\/p>\n
When Science And Culture Collide \u2014 What The Texas Cases Teach<\/p>\n
The Buckeye Knoll repatriation controversy of the early 2000s was not the first time the tension between scientific claims to ancient remains and Indigenous community authority over ancestral burials had reached national attention.<\/p>\n
It was part of a long series of conflicts that began in earnest with the political mobilization of Indigenous peoples in the 1960s and 1970s, intensified through the 1980s, and produced the legislative resolution of NAGPRA in 1990.<\/p>\n
<\/p>\n
Each case in this series has its own specific features, but they share a common structure.<\/p>\n
Scientific researchers argue that the ancient remains are irreplaceable sources of information about human prehistory that benefit humanity broadly, and that their reburial permanently forecloses the possibility of answering questions that future science might be able to address.<\/p>\n
Indigenous communities argue that their ancestors deserve the same respect accorded to any other human beings, that the history of treating Indigenous remains as scientific objects has been part of a broader pattern of colonial dispossession, and that the determination of what happens to ancestral remains belongs to the living descendants of those ancestors.<\/p>\n
Both of these arguments are morally serious.<\/p>\n
<\/p>\n
Neither is simply wrong.<\/p>\n
The tension between them is genuine and does not resolve neatly.<\/p>\n
What the Texas cases \u2014 and particularly the Buckeye Knoll controversy \u2014 illustrate is that the tension becomes most acute precisely at the point where the scientific value is highest: with the oldest, rarest, and most scientifically informative remains.<\/p>\n
The older the individual, the more significant they are for understanding the deep history of the Americas.<\/p>\n
But also the older the individual, the more tenuous the connection to any specific contemporary tribe, and the harder the cultural affiliation determination becomes.<\/p>\n
<\/p>\n
This creates a structural problem for the NAGPRA framework: the legal standard works reasonably well for remains from the past few centuries, where tribal identity and cultural continuity are historically documented.<\/p>\n
It works much less well for remains from thousands of years ago, where the connections between ancient populations and modern tribes are real but not demonstrable in any specific way.<\/p>\n
Various proposals have been made to address this structural problem.<\/p>\n
Some researchers have advocated for differential standards that give ancient remains more time before repatriation, allowing extended study while still ultimately returning them.<\/p>\n
Others have advocated for closer collaboration between scientists and tribal communities in designing research programs, so that the scientific work conducted is aligned with the questions and concerns of the communities with authority over the remains.<\/p>\n
<\/p>\n
Still others have argued for preserving skeletal collections in secure repositories \u2014 neither on museum display nor reburied \u2014 where they could be available for future study under controlled conditions and with tribal oversight.<\/p>\n
None of these proposals has become standard practice.<\/p>\n
The NAGPRA framework remains the law, and its implementation \u2014 imperfect, contested, and evolving \u2014 continues to shape how American archaeology deals with ancient human remains.<\/p>\n
The ancient Texans buried at Bering Sinkhole and Buckeye Knoll are already part of this story, through the specific decisions made about their remains and the controversies those decisions generated.<\/p>\n
Their bones contributed what they could to the scientific record in the time that was available.<\/p>\n
<\/p>\n
The questions their burial raises continue to animate debates about law, science, and the human past that have no final resolution in sight.<\/p>\n
The Researchers Who Opened The Window<\/p>\n
The archaeological and scientific work done at the Texas sites was carried out by researchers who were, in many cases, working under significant constraints \u2014 of time, of funding, of legal complexity, and of the competing claims of multiple stakeholders.<\/p>\n
Leland Bement, who conducted the primary analysis of the Bering Sinkhole materials and published the results through the University of Texas Press, produced what became the foundational reference for Archaic-period mortuary practices on the Edwards Plateau.<\/p>\n
His multi-disciplinary analysis drew on skeletal biology, faunal analysis, artifact description, radiocarbon dating, and geomorphological context to create a comprehensive picture of the sinkhole and its contents.<\/p>\n
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The team that investigated Buckeye Knoll \u2014 centered at Coastal Environments Inc., the consulting archaeology firm that conducted the excavations under contract to the Army Corps of Engineers \u2014 worked under the pressure of an engineering project timeline and the increasingly complicated legal and political environment of the repatriation debate.<\/p>\n
Bob Ricklis, the lead archaeologist, produced analyses and reports that documented the extraordinary nature of the site even as negotiations over the fate of the remains were ongoing.<\/p>\n
The physical anthropologists who analyzed the skeletal populations from both sites \u2014 working from the bones directly, measuring and observing the biological evidence encoded in the remains \u2014 faced the knowledge that their access to the materials was finite and might end abruptly.<\/p>\n
Their work had to balance thoroughness with speed, detail with the constraints of time and access.<\/p>\n
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The isotope specialists who analyzed the carbon and nitrogen signatures in bone collagen produced data that would outlast the physical remains themselves \u2014 the chemical record of ancient diets now preserved in the published literature even after the bones have been returned to the earth.<\/p>\n
All of these researchers were engaged in a race against time, in a landscape of competing claims, trying to extract as much knowledge as possible from evidence that might soon be inaccessible.<\/p>\n
The results of their work are what we have: an incomplete but significant record of life in Texas eight thousand years ago.<\/p>\n
The Question Of How Long People Have Been Here<\/p>\n
The 8,500-year-old burials of Buckeye Knoll and the 7,000-year-old burials of Bering Sinkhole are impressive dates.<\/p>\n
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They push the documented human presence in the Guadalupe River corridor and the Edwards Plateau well back into the early Holocene.<\/p>\n