POLLEN, PHYTOLITH, STARCH, AND PROTEIN RESIDUE ANALYSIS OF GROUNDSTONE AND POLLEN AND PHYTOLITH ANALYSIS OF FEATURE FILL FROM THE EAGLE TREE SITE (48CO2920) IN THE POWDER RIVER BASIN, WYOMING

The Eagle Tree site (48CO2920) is a prehistoric campsite situated on a partial bench and terrace above an ephemeral drainage near Antelope Creek. Excavations exposed multiple thermal features from the Thunder Basin Phase. Feature BF-F1, a hearth or oven, dated to the Late Prehistoric period and yielded a groundstone metate that was submitted for pollen, phytolith, starch, and protein residue analyses. Analyses were conducted to contribute information about the function of the artifact and food processing activities at the site. Additional fill samples collected from three hearths were submitted for pollen and phytolith analysis to provide information on feature use.

鹰树遗址（48CO2920）是一处史前营地，坐落于羚羊溪附近季节性排水渠上方的局部阶地与台地之上。考古发掘揭露了多件属于雷霆盆地期的用火遗迹。其中编号为BF-F1的遗迹为一处灶或烤炉，年代可追溯至史前晚期，其出土的一件磨制石磨盘（metate）已被送检，开展孢粉、植硅体、淀粉及蛋白质残留物分析。本次分析旨在为了解该人工制品的功能以及遗址内的食物加工活动提供相关数据支撑。此外，研究人员还从三处灶遗迹中采集了填充土样，送检开展孢粉与植硅体分析，以获取该类遗迹的使用相关信息。