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Plate 6. Points used in comparative analysis: a) FS20, b) FS15, c) FS66, d) FS123, e) FS <br />100, f) FS131, g) FS 23, h) FS 105 (ordered by estimated age BP). <br />The diagnostic artifacts indicate potential occupations of the site that predate the <br />radiocarbon samples that were analyzed. The categories that are represented are small to <br />medium unnotched with a convex base, small stemmed and corner -notched, medium corner - <br />notched, and large tri -notched. The former are often simply classified as unnotched bifaces <br />that are either projectile point preforms or small knives. They have been recorded in Late <br />Prehistoric and Late Formative Era sites in Utah and Colorado and generally classified as the <br />Cottonwood Triangular type. Since they were scattered in the upper 20cm of deposits, they <br />likely date the same as the small stemmed and corner -notched types. The latter have been <br />documented in other sites in Northwest Colorado. Notably at 5MF3012, similar points were <br />dated between 1200 BP and 960 BP (Metcalf 2011:114-115). The ca. 1100-1000 BP date span <br />for the Formative Era occupation of 5MF7762 fits well into that established at 5MF3012. <br />The larger corner -notched point is similar to a specimen from 48SW8842 that was <br />found in the upper part of the stratigraphy beneath a level that yielded a 1730±100 BP age and <br />was stratigraphically nearest a date of 2950±100 BP (ibid.). This point is similar to the deeply <br />corner -notched points of the Late Plains Archaic called Pelican Lake, a type that replaced the <br />McKean Complex points by ca. 3100 BP [ca 1360 BC], which in turn was replaced by about <br />2700 BP [ca. 850 BC]. Pelican Lake points have been identified in sites in the Rocky Mountains <br />and western Great Plains region from as far north as south-central Saskatchewan Canada <br />through Wyoming and into northern Colorado (Frison 1991:101). <br />W. <br />