You are here
Home > Posts tagged "Gypsum"

One of the oldest human habitation sites in North America

Radiocarbon dating on artifacts in a gypsum cave in Nevada shows the site was used by humans over 4,000 years ago. Harrington’s surprise discovery was darts and other human artifacts below the ground sloth layer. Since the Shasta ground sloth became extinct about 9,000 years ago, the evidence seemed to indicate

Top