Collaborative Research: Criteria for extending sequences across regional shelf-to-slope carbonate environment: Upper Ordovician and Silurian Strata of the Great Basin

9317719希恩在这项合作研究中，PIS将制定和评估识别外陆架和斜坡碳酸盐环境中的地层层序的标准。在这些环境中识别层序边界是有问题的，因为典型的边界标准不适用--不存在暴露事件，并且很难从露头规模的暴露中提取地层几何图形。PIS将结合对美国大盆地奥陶系和志留系地层的地层学、沉积学和生物地层学研究，开发一个层序模型；这些层序将沿着倾角和走向横断面进行追踪，以评估可用于识别层序界面的标准的变化。这项工作不仅有助于了解大盆地的古生代历史，而且有助于建立深水碳酸盐单元的层序地层学模型。研究结果将在学术界和工业界都有用处。

9317719 Sheehan In this collaborative research, PIs will develop and evaluate criteria for recognizing stratigraphic sequences in outer-shelf and slope carbonate environments. Recognition of sequence boundaries in these settings is problematic because typical boundary criteria are not applicable--exposure events are absent and stratal geometries are difficult to extract from outcrop-scale exposures. PIs will combine stratigraphic, sedimentologic and biostratigraphic study of Ordovician and Silurian strata in the U.S. Great Basin to develop a sequence model; the sequences will be traced along dip and strike transects to evaluate changes in criteria usable in identifying sequence boundaries. This work will contribute not only to understanding Paleozoic history of the Great Basin, but also to developing sequence stratigraphic models for deeper-water carbonate units. Results will have use in both academia and industry.