POLLEN ANALYSIS AT BULL CREEK III, OKLAHOMA

Five pollen samples were extracted from 34BV176 (Bull Creek III), a PaleoIndian site located near Bull Creek in Beaver County, Oklahoma (Table 1). Sediments represented by these samples were collected from the 5AB levels and the underlying 5Btk level at the site. These samples were collected in the same layer that yielded a radiocarbon date of 13,210 ± 80 radiocarbon years BP (RCYBP), as well as slightly above and below this level. All five samples were collected below the sediment dated to 12,550 ± 70 RCYBP. Pollen analysis was undertaken to describe the paleoenvironment at this time in the Late Pleistocene.从位于俄克拉荷马州比弗县布尔克里克附近的古印第安（PaleoIndian）遗址34BV176（布尔克里克III号）中提取了5份花粉样品，相关信息详见表1。上述样品所代表的沉积物采集自该遗址的5AB层位及其下伏的5Btk层位。这批样品的采集范围涵盖了获得13210±80放射性碳年BP（radiocarbon years BP，RCYBP）测年结果的同一层位，以及该层位上下紧邻的沉积物。全部5份样品均采集自测年结果为12550±70 RCYBP的沉积物之下。本次研究开展花粉分析，旨在阐释晚更新世该时期的古环境状况。