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10.1 Diagnostic Artifacts <br />Archaeological investigations for this project were guided by a framework of research <br />questions that were drawn from the known cultural background and applied to specific sites <br />and to the interrelationship of sites within the geographically defined area of Northwest <br />Colorado. One of the primary concerns during the data retrieval was the development of a <br />cultural chronology. Despite the low sample number of diagnostic artifacts, when compared <br />with regional references, the ones recorded produced temporal associations relative to the <br />known temporal distribution of types. The reference that best provided comparable projectile <br />point types was the 2011 Wyoming Interstate Company (WIC), LLC, Piceance Basin Expansion <br />Project: Final Report of Excavations, Mo fat and Rio Blanco Counties, Colorado, and <br />Sweetwater County, Wyoming, Volume 1, Michael D. Metcalf, editor. <br />Only one projectile point was recovered from the surface of the site, an Uncompahgre <br />Complex Type 22 from the Roubideau Phase dating approximately 3000-500 BC, (Buckles <br />1971). Fragments of 11 were found during testing, but only eight of those collected during the <br />excavation were complete enough for comparative analyses. Definable periods of the <br />diagnostics represent occupations during the Formative Era and the Late Prehistoric periods <br />(Table 1, Plate 6). <br />Table 1. List of projectile points used in comparative analysis (ordered by depth in deposits). <br />Number <br />Provenience <br />Type <br />Image <br />FS 15 <br />TPI, 0-2cm <br />small, unnotched with a convex base <br />Plate 5, b <br />FS 20 <br />TT2, 10-20cm <br />small, unnotched with a convex base <br />Plate 5, a <br />FS 66 <br />1 C2, 10-20cm <br />medium, unnotched with a convex base <br />Plate 5, c <br />FS 123 <br />1 B3, 10-20cm <br />Small stemmed <br />Plate 5, d <br />FS 23 <br />TPI, 10-20cm <br />Medium corner -notched <br />Plate 5, g <br />FS 105 <br />1 C3, 25-30cm (top <br />of bedrock <br />Large tri -notched base fragment, <br />projectile point or knife <br />Plate 5, h <br />FS 131 <br />1B3, 30-40cm <br />Small corner -notched with broad <br />straight base <br />Plate 5, f <br />FS 100 <br />TTI B-4, 30-40cm <br />Small corner -notched <br />Plate 5, e <br />27 <br />