The 13,000-Year-Old Man Found On A California Island — And The Dating Test That Changed The Story Of America’s First Migration
The geological team that returned to Arlington Canyon used more sophisticated methods — detailed sedimentological description, multiple AMS dates from the sequence, and the physical characteristics of each layer — to establish the chronological framework of the canyon fill.
Their work produced a dated sequence confirming the terminal Pleistocene age of the bone-bearing stratum.
This is geology as time machine: the ability to read the physical record of accumulated sediment as a calendar, with each layer marking a period of Earth history and the organisms within each layer marking the living world of that period.
The two femora at Arlington Springs marked 13,000 years ago in that geological calendar.
Everything above them marked the time since.
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