Aminostratigraphic Offsets in the Marine Quaternary of the Atlantic Coastal Plain: A Search for Possible Causes

将对北卡罗来纳州和南卡罗来纳州大西洋海岸平原水下和浮出水面部分的第四纪软体动物样本进行氨基地层分析。这些结果将有助于检验滨海平原第四纪对比的两种相互排斥的氨基地层模型。这些模型要么要求弗吉尼亚州诺福克和南卡罗来纳州查尔斯顿之间的地区保存了不寻常的第四纪晚期海平面/构造记录，要么要求该地区的一些U系列珊瑚年代是不正确的。目前可获得的北卡罗来纳州瞭望角地区更新世的资料表明，该地区标志着两种不同类型保存下来的地层记录之间的分界线，其中瞭望角东北部的第四纪记录更为完整。在拟议的研究期间，将评估保存的记录中的这种对比对沿海平原氨基地层和U系列数据以及对区域热、沉积学和构造史的影响。

Aminostratigraphic analysis of Quaternary mollusc samples from subsurface samples of the submerged and emerged portion of the Atlantic Coastal Plain in North and South Carolina will be conducted. These results will aid in the testing of two mutually exclusive aminostratigraphic models for Coastal Plain Quaternary correlation. These models require either that the region between Norfolk, VA and Charleston, SC has preserved an unusual late Quaternary sea-level/tectonic record or that some U-series coral dates for the region are incorrect. Currently available data from the Pleistocene of the Cape Lookout, NC region indicate that this area marks the boundary between two distinctive types of preserved stratigraphic records, with the Quaternary record northeast of Cape Lookout being more complete. The implications of this contrast in preserved records for Coastal Plain aminostratigraphic and U-series data, and for regional thermal, sedimentologic and tectonic histories will be evaluated during the proposed research.