Estimating the Magnitude of Eustasy, Late Cretaceous Through Miocene, New Jersey Coastal Plain - Ocean Drilling Project Leg 174X

这项拟议的研究将增进我们对过去1亿年来海平面(或全球)变化历史的了解。这一信息在地球科学研究中至关重要，因为海平面变化是测量所有构造的基准。它也是大陆冰川作用以及海洋生成和大陆造山作用发生重大变化的指标。最后，如果短期海平面变化(=0.5-3 m.y。变化)可以被显示为海平面，并确定其年代，然后可以用于全球对比，其规模比大多数生物地层学方法更精细。对新泽西州沿海平原钻孔的详细分析，结合近海层序地层分析和近海油井数据，为分析长期和短期海平面变化提供了前所未有的数据集。通过对这些数据进行回溯分析，我们预计将在评估短期快感的真实性及其大小方面取得重大进展，同时就地层解释的含义提供非常重要的反馈。以前的工作表明，从这些类型的钻孔(ODP150X)获得的数据足以获得短期(0.5-3.0英里)的震级。持续时间)海平面事件。这些新井将验证或使我们对中新生代至晚新生代记录的理解复杂化，将海平面(全球海平面)估计延长至晚白垩世，并将海平面(区域)估计延长至白垩纪中期。这项工作的结果将对研究近海层序和研究许多其他边缘的这个时代的海平面变化至关重要。

9814025KominzThe proposed research will enhance our knowledge of the history of eustatic, (or global) sea-level changes over the last 100 million years. This information is critical in earth-science studies because eustatic sea-level change is the datum against which all tectonics is measured. It is also an indicator of continental glaciation and of large changes in ocean generation and continental orogeny. Finally, if short-term sea-level change (=0.5 - 3 m.y. variations) can be shown to be eustatic, and dated then it could be used for global correlation at a scale finer than that of most biostratigraphic methods. The detailed analyses of boreholes drilled in the New Jersey coastal plain in conjunction with offshore sequence stratigraphic analyses and offshore well data provide an unprecedented data set for analysis of both long-term and short-term sea-level changes. By performing backstripping analyses of these data, we expect to make major strides in assessing the reality of short-term eustasy and it's magnitude, while at the same time providing very important feedback on the implications of stratigraphic interpretation as they are made. Previous work has shown that the data obtained from these types of boreholes (ODP leg 150X) is sufficient to obtain magnitudes of short-term (0.5 - 3.0 m.y. duration) sea-level events. The new wells will verify or complicate our understanding of the middle to late Cenozoic record, extend eustatic (global sea-level) estimates back to the late Cretaceous, and extend sea-level (regional) estimates to the middle Cretaceous. The results of this work will be critical to studies of offshore sequences and studies of sea-level changes of this age in many other margins.