Deep time global seawater (SST & SSC) records and far-field climatic & sealevel changes

古生代（从5.42亿年前到2.51亿年前）是一个异常事件和地质剧变的时期，如生命的异常辐射，外星撞击和大规模灭绝，所有这些都被高山和大陆冰川所打断。研究建议收集代用材料（即腕足类和三叶虫）和地球化学证据（微量化学和同位素化学）来表征这些事件。本项目的材料将来自两个主要来源，一个是古生代沉积在日本海底山的碳酸盐，反映了泛海海洋（前身太平洋）的海洋学，另一个是北美大陆边缘的大型连续序列。在古生代生物地理学的背景下，这些序列在沉积学和地层学上都得到了很好的界定，因此后者是独特而重要的。

The Paleozoic (from 542 to 251 million years ago) was a time of extraordinary events and geologic upheaval such as the extraordinary radiation of life, extraterrestrial impacts and mass extinctions, all punctuated by both alpine and continental glaciations. The study proposes to collect proxy material (i.e. brachiopods and trilobites) and examine the geochemical evidence (trace and isotope chemistry) to characterize these events. Material for this project will come from two major sources, one being carbonates deposited on seamount Japan during the Paleozoic reflecting Panthalassic Ocean (precursor Pacific) oceanography and from large and continuous successions at the North American continental margin. The latter localities are unique and important in that the successions are sedimentologically & stratigraphically well defined in the context of Paleozoic biogeography.