A Stratigraphic and Geochemical Transect Across Northern South America for Assessment of Paleoceanographic Events in the Caribbean Gateway During the Middle Cretaceous

小行星9304659 PI将为南美洲北方的早白垩世和中白垩世建立一个高分辨率的地层和地球化学框架，重点是Cenomanian-Turonian边界层段。 需要这些数据来建立一个区域的海平面变化，初级海洋生产和生物进化的加勒比门户之间的太平洋和发展中的大西洋。 同位素和地球化学数据将用于计算保存在这一边缘的海洋有机碳总量，从而有可能评估赤道地区对白垩纪大气中二氧化碳和氧气全球浓度的影响程度。

9304659 Pratt PIs will develop a high-resolution stratigraphic and geochemical framework for the Lower and middle Cretaceous in northern South America, with focus on the Cenomanian-Turonian boundary interval. These data are needed to establish a regional picture of sea level change, primary marine production, and biologic evolution in the Caribbean gateway between the Pacific and the developing Atlantic oceans. Isotopic and geochemical data will be used to calculate the total quantity of marine organic carbon preserved on this margin, making it possible to assess the degree to which the equatorial region influenced global concentrations of carbon dioxide and oxygen in the Cretaceous atmosphere.