Correlation and Chronology of Late Cenozoic Marine Trans- gressions in Western Alaska

晚新生代的海洋沉积物覆盖了阿拉斯加西部和北部的梯田和沿海平原，提供了异常详细的高海平面事件记录，是北极地区已知的最完整的记录。这些沉积物与冰川漂移序列互层，包含了宝贵的北极古气候年历，并确定了北冰洋冰盖的起源时间和后来的大部分历史。晚新生代海相沉积物中的化石也记录了海相和陆相的扩散事件，从而补充了海洋间的对比。这项研究将应用氨基酸年代学、热释光和古地磁研究，对暴露在圣劳伦斯岛、苏厄德半岛和Kotzebue海湾周围的海侵沉积物进行研究，以评估和纠正先前发表的年龄相关性。因此，这项研究将使我们对阿拉斯加西部和北部海平面变化的范围和时间有更确切的认识，并将为发展北极古气候和古海洋学制度的天气学知识提供一系列极其有用的时间平面。

Late Cenozoic marine deposits blanketing terraces and coastal plains in western and northern Alaska provide an exceptionally detailed record of high sea level events, the most complete known in any part of the Arctic. Interbedded with glacial drift sequences, these deposits contain an invaluable almanac of Arctic paleoclimates, and establish the time of origin and much of the subsequent history of the Arctic Ocean ice cover. Fossils in the late Cenozoic marine deposits also record both marine and continental dispersal events and thus supplement and interoceanic correlations. This investigation will apply amino-acid geochronology, thermoluminescence, and paleomagnetic studies to marine transgressive deposits exposed on St. Lawrence Island, Seward Peninsula, and around Kotzebue Sound in order to evaluate and correct previously published age correlations. The study will thus result in a much firmer knowledge of the extent and timing of sea-level changes in western and northern Alaska and will provide an extremely useful series of time planes for the development of synoptic knowledge of Arctic paleoclimates and paleo-oceanographic regimes.