The archaeological sequence at the site shows gradual changes in material culture and subsistence practices over this long period of occupation, with the early Holocene layers containing the skeletal material most directly relevant to the Population Y debate.

One of the most remarkable finds from Lapa do Santo is evidence of a burial practice that is unique in the early archaeological record of the Americas: what has been described as a “decapitated and amputated” burial, in which a human skull was buried separately from the body, with the hands positioned around the skull.

This complex burial practice implies a specific set of mortuary rituals and beliefs about the treatment of the dead that goes well beyond simple interment of the deceased.

It is evidence of a culture with sophisticated symbolic and ritual practices — practices that required specific knowledge, specific materials, and specific organizational capacity to carry out.