POLLEN, MACROFLORAL, AND PROTEIN RESIDUE ANALYSIS AT SITE 48CA450, NORTHEAST WYOMING

Samples from Site 48CA450 in northeast Wyoming were submitted for pollen, macrofloral, and protein residue analysis. This site may be a multicomponent site with surface and subsurface components. The deeper buried horizon yielded Pelican Lake style projectile points. Other Pelican Lake sites in the area have yielded radiocarbon dates of 3,000 - 3,800 B.P. The surface features are believed to be younger, and may yield radiocarbon dates around 1100 + B.P. One surface sample and fifteen pollen column soil samples were analyzed for pollen content, resulting in a terrace stability record and tentative environmental information. Macrofloral analysis of hearth fill samples is used to provide information concerning plant resources that may have been utilized by the various occupants of the site. One of the Pelican Lake-style projectile points from the deeper buried horizon was analyzed for possible protein residues in order to obtain information concerning prehistoric faunal resources.美国怀俄明州东北部的48CA450遗址（Site 48CA450）出土样品被送检，用于开展孢粉（pollen）、大植物遗存（macrofloral）以及蛋白质残留物（protein residue）分析。该遗址可能为一处兼具地表与地下遗存的多组分遗址。埋藏较深的地层出土了鹈鹕湖（Pelican Lake）风格投射尖状器（projectile points）。该区域内其他鹈鹕湖风格遗址的放射性碳测年数据（radiocarbon dates）为距今3000～3800 B.P.。地表遗存被认为年代更晚，其放射性碳测年数据可能约为距今1100+ B.P.。研究人员对1件地表样品与15件孢粉柱土样（pollen column soil samples）开展了孢粉成分分析，由此得到台地稳定性记录与初步古环境信息。对灶坑充填物（hearth fill）样品的大植物遗存分析，可为揭示该遗址各阶段使用者所利用的植物资源提供参考。研究人员对出自较深埋藏地层的1件鹈鹕湖风格投射尖状器开展了蛋白质残留物分析，以获取史前动物资源相关信息。