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<br />• <br />u <br />Table 0. Time Framework of Geologic Events and Aboriginal Cultures* <br />1'esrs Before Continental Divide <br />Present Culture And Cirque Glaciation <br />0 Historic Ute, Arapahoe <br /> and Shoshoni <br />500 Upper Republican; Fremont <br />150U Ceramic-Plains Woodland <br />?000 Preceramic-Plains SVoodland <br />2500 Late Archaic <br />1000 Middle Archaic <br />~,OOU Early Archaic <br />.000 Paleo-Indian <br />9000 (Cody) <br />10,000 (Folsom) <br />11,000 (Clovis) <br />1~k,000 <br />Paleo-Indian Period <br />Arapahoe Peak Advance <br />Audobon Advance <br />Triple Lakes Advance <br />Altitherinal Climatic Episode <br />Satanta Pea:< Advance <br />Pinedale Advance <br />I[ is [raditionnl to date the beginning of the Paleo-Indian period at about 12,000 B.P., or <br />~i little earlier. It is now becoming apparent, however, that nearby areas were occupied <br />'.~y npre-Clovis culture with a tool technology based, in lure part, on the bones of <br />extinct Pleistocene fauna (Bonnichson 1978; Stanford 1978). Very little is known about <br />this "pre-projectile point stage" (:Vormington 1957), although an increasing number of <br />reliably dated, stratified sites are being reported (Bryan 1978). This "pre-projectile point <br />stage" has been geologically dated at 17,000 B.P. in eastern Colorado, and is under a <br />level containing Clovis material (Stanford 1978). <br />*Adapted from Eddy and lVindmiller (1975) <br />15 <br />