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-13 - <br />~~ The Riddle Plains Archaic extended from 3000 B.C. to 1000 B.C. and <br />is manifest in the McKeau Complex. Representative projectile point <br />types include HcKean, Duncan and Hanna points (Frison et al. 1974: 123). <br />- ~ <br />Although hunting continued to be significant in terms of subsistence, <br />the artifact assemblages of this period imply increased exploitation of <br />plant foods. the McKean Complex is well represented in northern, central <br />and northwestern Colorado (Breternitz 1970; Creaseman et al. 1977; <br />C. Jennings 1974: 10; Lischka and Miller 1978). A Middle Plains Archaic <br />site was found east of the project area in a similar environmental <br />setting (Arthur 1977: 99, 159-160). ~, i <br />.:; { <br />Small corner-notched and stemmed projectile points predominated <br />during the Late Archaic period (1000 B.C. - A.D. S00). Hunting of <br />large and small game as well as plant food~exploitatioa continued. <br />C• During this period, the relationship of the Late Archaic cultures <br />in northwestern Colorado to those in the Great Basin becomes increasingly <br />pronounced. Late Archaic sites containing artifacts related to the <br />Desert Archaic and to the Uncompahgre Complex are common (C. Jennings <br />1974: 10; Bridge and Knox 1978: 8). <br />Evidence of the semi-sedentary, horticultural Fremont culture <br />is abundant in the vicinity of Douglas Creek, adjacent to the western <br />border of the Piceance Basin and located southwest of the study area, <br />and in. Dinosaur National Monument, located west-northwest of the study <br />area. Fremont occupation in those areas is thought to have extended <br />from approximately A.D. 800 to A.D. 1200. This culture represents the <br />region's sole exception to the Archaic migratory, hunter-gatherer pattern <br />of subsistence, which coexisted with the Fremont culture and persisted <br />to historic times. Innovations manifest in the generalized Fremont <br /> <br />