Shell geochemistry and environmental instability along the Georgia Coast during the Late Archaic Period (5000 - 3800 BP)

This dataset includes stable oxygen isotope (δ18O) data collected from eastern oysters (n=19) (Crassostrea virginica) and hard clams (n=59) (Mercenaria spp.) from the Late Archaic (ca. 50000-3500 cal. BP) Sapelo Shell Rings on Sapelo Island, Georgia. A total of 1064 isotope samples were collected and analyzed from these shells. The data are part of a larger project reconstructing paleo-climate and Native American adaption and resilience in the context of climate instability along the South Atlantic coast of North America during the Late Archaic Period. Shell isotope samples were collected by multiple researchers over the last decade. Carey Garland added to and cleaned the data between June 2020 and December 2021. The dataset was structured to include site name, location, and provenience (e.g., unit, level, etc.) associated with each shell analyzed, as well as all raw isotope data. The original database contains sensitive information, such as the specific location of archaeological sites. If a professional archaeologist needs site location information, they can contact the Georgia Archaeological Site File.

本数据集涵盖采自美国佐治亚州萨佩洛岛萨佩洛贝壳环遗址的稳定氧同位素（stable oxygen isotope, δ¹⁸O）数据，样品涉及样本量为19的东部牡蛎（Crassostrea virginica）与样本量为59的硬壳蛤（Mercenaria spp.），其所属年代为晚古风期（约50000–3500 cal. BP）。研究人员从上述贝壳中共采集并分析了1064份同位素样品。本数据集隶属于一项大型研究项目，该项目旨在重建北美南大西洋沿岸晚古风期气候不稳定背景下的古气候状况，以及美洲原住民的适应策略与韧性水平。过去十年间，多名研究人员参与了这批贝壳同位素样品的采集工作。凯里·加兰（Carey Garland）于2020年6月至2021年12月期间对该数据集进行了补充与清洗操作。本数据集的字段设置涵盖了每一枚待测贝壳的遗址名称、地理位置以及出土背景（如发掘单元、地层等），同时收录了全部原始同位素数据。原始数据库包含敏感信息，例如考古遗址的具体地理位置。若专业考古工作者需要获取遗址地理位置信息，可联系佐治亚州考古遗址档案库（Georgia Archaeological Site File）。