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Archaeological evidence from the Chang Tang Reserve suggests that humans may have first colonized the Tibetan Plateau during the late Pleistocene. Blade, bladelet and microblade technologies are found as surface assemblages in a variety of contexts above 4500 m elevation. The lack of modern analogues for foraging populations in high-elevation environments brings about a reconsideration of the diversity and organization of Pleistocene hunter-gatherer adaptations.
Brantingham et al. (Fri,) studied this question.