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22 Class III Inventory, Colowyo's Collom Mine Project <br />The establishment of a chronological framework for a large area with a large site database is an <br />important avenue of research. Ideally, a fine- grained chronology can best be developed through <br />comparison of a large database of chronometrically dated components ascertained through data <br />recovery projects. An accurate in -depth chronology for the current project area is not possible given <br />the paucity of extensive data recovery projects within the investigated area. <br />A broad chronology can, however, be developed by use of projectile point typologies. This line of <br />inquiry is limited, however, by the inherent problems associated with this mode of examination. <br />Among the problems are the potential curation and reuse of projectile points by later groups and the <br />general inexactness of correlating projectile point types to specific time periods. <br />Reed and Metcalf (1999) summarized the site types recorded in the region, and open artifact scatters <br />represented 84% of the recorded sites. Sheltered artifact scatters were 6% of the total, with none of <br />the remaining types equaling more than 3 %. Based on the prevalence of open artifact scatters, it is <br />likely that the majority ofprehistoric sites recorded during the current project will represent this type. <br />Because these sites will be comprised mostly of flaked stone artifacts, analysis of the raw material <br />types represented in each assemblage and in the project overall has the potential to provide data that <br />maybe used to assess movements of groups and /or trade from regions adjacent to the current project. <br />Therefore, the BLM Little Snake Field Office has established a list of potential toolstone raw <br />material types referenced to known sources that will be used to investigate this topic. These material <br />types are discussed below. <br />Based on the review of information on file at the BLM Little Snake Field Office, data obtained from <br />OAHP, a review of previous work conducted in the region, and inspection of USGS 7.5' topographic <br />quadrangles for slope and vegetation information, it was expected that a moderate density of cultural <br />resources would be encountered during the current Class III inventory. As summarized above in <br />Section 3.0, approximately 10,83 8 acres within the current project area have already been inventoried <br />at a Class III intensity level, and the previous work resulted in the recording of 51 sites <br />(20 prehistoric sites, 24 historic sites, two multicomponent sites, four rock cairns of undetermined <br />47599 TRC Mariah Associates Inc. <br />