Word: chert
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Dates: during 1930-1939
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...made a find in a dry arroyo that brought Dr. Frank Harold Hanna Roberts on the run from the Smithsonian Institution. Beneath 20 feet of ancient soil, Dr. Roberts laid bare what must have been a teeming Ice Age campsite and tool factory. Besides 30 Folsom points of jasper, chert and chalcedony, there was a scattered armamentarium of scrapers, knives, drills, engraving implements, hammers. Extending over a half-mile, the site was apparently once a lush pasture where Pleistocene animals, following the retreating ice rim, came to feed. That the hunters were contemporaries of the animals was perfectly plain because...