POLLEN, STARCH, AND ORGANIC RESIDUE (FTIR) ANALYSIS OF SEDIMENT FROM THE SOURDOUGH I SITE, 48SW19463, SWEETWATER COUNTY, WYOMING

The Sourdough I Site (48SW19463) is located 20 miles north of Wamsutter, Wyoming, in the northern portion of the Great Divide Basin. The site is situated on a land peninsula, extending into a dry playa lake bed. Site 48SW19463 exhibits seven features, four of which were sampled for pollen, starch, and/or FTIR analysis. Features 1 and 2 date between 1680–1730 BP, indicating an early occupation phase of the Late Prehistoric Uinta Phase. Features 4 and 5 date between 1070–1120 BP, indicating a more recent occupation phase. Features 1, 2, and 3 comprise a cluster located north of Features 4 and 5, and east of Features 6 and 7. Sediment from Features 1, 2, 4, and 5 was selected for pollen, starch, and/or FTIR analysis.