Early/Late Maastrichtian Climatic History of the South Atlantic and Indian Oceans (Marine Geology): VPW

与先前的统一、温暖和平静的建议相反 晚白垩世的气候条件，有孔虫 深海和陆上层序的同位素结果显示， 逐渐变冷，以及显著的气候和海洋 马斯特里赫特时期的变异性 标记的表皮 甲醛值增加与 特定的海洋值，记录的海平面回归， 海水87 Sr/86 Sr比值从早到晚呈上升趋势， 和最新的马斯特里赫特人 这些事件的巧合， 马斯特里赫特阶底栖有孔虫相似性 值和中始新世与冰筏 碎片，表明这些变化可能与 冰川海平面变化现象 该研究计划将 调查和记录气候和海洋历史 早至晚马斯特里赫特时期的高纬度和中纬度地区 基于有孔虫氧气的南大西洋和印度洋 和碳同位素测量，以及有孔虫定量 分析。 深海剖面生物地层对比 将通过生物地层学的整合得到加强， 磁性地层学和化学地层学。 的证据 马斯特里赫特时期大量的大陆冰堆积 将对白垩纪的建模产生重大影响 气候以及对气候历史的解释 将军 该项目将导致更好的古海洋学 与气候演变有关的重建，表明 某些变化是何时以及如何发生的 它促进了VPW 方案目标为妇女提供机会， 通过以下方式推进他们在科学或工程领域的职业生涯： 研究，并鼓励其他妇女追求事业， 这些领域通过调查人员的提高能见度， 学校里的榜样 本工程 有助于实现第二个目标的拟议活动 包括：教授化学-生物关系课程， 化石记录;在地质专题讲座， 普林斯顿附近的大学、学院和高中 大学鼓励女学生从事科学研究 职业;共同教学部门研讨会每学期。

Contrary to previous suggestions of uniform, warm and equable climatic conditions during the Late Cretaceous, foraminiferal isotopic results from deep-sea and onshore sequences reveal progressive cooling, and significant climatic and oceanographic variability during the Maastrichtian. Episodes of marked increase in forminiferal values correlate with decreases in specified oceanic values, documented sea level regressions and increases in seawater 87Sr/86Sr ratios in the early to late, and latest Maastrichtian. The coincidence of these events, and the similarity between Maastrichtian benthic foraminifera values and those of middle Eocene age associate with ice-rafted debris, suggest that these variations might be related to glacioeustatic phenomena. The research proposed will investigate and document the climatic and oceanographic history of the early to late Maastrichtian in the high and mid latitude South Atlantic and Indian Oceans based on foraminiferal oxygen and carbon isotope measurements, and foraminiferal quantitative analyses. Biostratigraphic correlation of deep-sea sections will be enhanced by integration of biostratigraphy, magnetostratigraphy and chemostratigraphy. Evidence of substantial continental ice accumulation in the Maastrichtian will have significant implications for modeling of Cretaceous climates as well as interpretations of climatic history in general. This project should lead to better paleooceanographic reconstructions, relevant to climatic evolution, suggesting when and how certain changes developed. It furthers VPW program objectives to provide opportunities for women to advance their careers in science or engineering through research, and to encourage other women to pursue careers in these areas through the investigators' enhanced visibility as role models on the host campuses. In this project, the proposed activities which contribute to the second objective include: teaching a course in chemical-biotic relations in the fossil record; giving lectures in geologic topics to universities, colleges and high schools near Princeton University to encourage women students to pursue scientific careers; co-teaching a departmental seminar each semester.