ORGANIC RESIDUE (FTIR) ANALYSIS OF FIRE-CRACKED ROCK FROM THE CLEAR CREEK OUTLET (48YE678), TRAIL CREEK OUTLET (48YE1499), AND WOLF POINT (48YE1660) SITES ON YELLOWSTONE LAKE, YELLOWSTONE NATIONAL PARK, TETON COUNTY, WYOMING

Fire-cracked rock from five hearths at the Clear Creek Outlet (48YE678), Trail Creek Outlet (48YE1499), and Wolf Point (48YE1660) sites on Yellowstone Lake in northwestern Wyoming were submitted for organic residue analysis. Samples were tested for organic residues using Fourier Transform Infrared Spectroscopy (FTIR). Organic residue analysis provides information concerning compounds extracted from the fire-cracked rock using matches with our reference library of raw and processed plants, to interpret the record of foods that might have been processed in association with hearths at these sites.