RUI: Integrated Stratigraphic and Sedimentological Analysis of the Cambro-Ordovican Inner Shelf, Colorado

小行星9419141 动物区系更替的间隔（包括主要更新）与可能最终控制这些事件的各种沉积和构造过程之间的关系，对于全面了解地层记录至关重要。 系统动力学的完整分析需要整合来自近岸-近海剖面中所有区域的沉积学、古生物学和地层学数据。 寒武-奥陶纪边界间隔记录了几次动物群更替事件，包括Cordylodus proavis牙形刺带底部的一次大灭绝，由于生物地层分辨率差，在北美的内部碎屑带沉积中通常未被识别或未被保存。 从有据可查的寒武-奥陶纪地台和大盆地近海地区以及其他地方获得的沉积学和生物地层学数据已被用来提出动物群演化的过程-响应模型，在许多情况下，这些模型包括假定的狂喜“事件”。 不幸的是，很少或根本没有信息存在于同时代的近端的肉体存款的动物区系周转的时间间隔与沉积和构造事件，这可以被用来作为一个测试的原因，preciptions或全球相关的建议狂喜事件的关系。 科罗拉多中部和西部的寒武-奥陶纪硅质岩和碳酸盐岩暴露较厚，为评估古北美寒武-奥陶纪这一生物地层学上不受约束的古地理区域在动物群更替事件期间和之间沉积体系的时空变化提供了极好的机会。 提出了一个为期两年的沉积学和地层学研究项目，其中使用牙形石生物地层学和沉积学标准识别不整合岩将首次能够为科罗拉多寒武-奥陶纪建立详细的层序地层格架。将这些沉积物的系统动力学与有据可查的舷外演替相结合，将有助于更全面地了解动物群落和沉积系统的演变之间的相互作用。

9419141 Myrow The relationship between intervals of faunal turnover, including major extinctions, and various depositional and tectonic processes which may ultimately govern these events, is critical to the holistic understanding of the stratigraphic record. Integration of sedimentological, paleontological, and stratigraphic data from all regions in an onshore-offshore profile are required for a complete analysis of system dynamics. The Cambro-Ordovician boundary interval, which records several faunal turnover events including a major extinction at the base of the Cordylodus proavis conodont zone, is generally unrecognized or not preserved in inner detrital belt deposits in North America because of poor biostratigraphic resolution. Sedimentological and biostratigraphic data from well-documented Cambro-Ordovician platform and offshore areas of the Great Basin and elsewhere have been used to propose processes-response models for faunal extinctions, which in many cases include puported ecstatic "events". Unfortunately, little or no information exists from coeval proximal carnal deposits concerning the relationship of intervals of faunal turnover with depositional and tectonic events, which can be used as a test of the cause of extinctions or the global correlation of proposed ecstatic events. Well-exposed and thick Cambro-Ordovician siliciclastic and carbonate carnal rocks in central and western Colorado provide an excellent opportunity to assess spatial and temporal changes in depositional systems during and between faunal turnover events for this poorly understood and biostratigraphically unconstrained paleogeographic region in the Cambro-Ordovician of ancient North America. A two-year project is proposed for a sedimentological and stratigraphic study in which the recognition of unconformitites using conodont biostratigraphy and sedimentological criteria will for the first time enable construction of a detailed sequence-stratigraphic framework for the Cambro-Ordovician of Colorado. Co mparison of systems dynamics for these deposits with well-documented outboard successions will contribute to a more complete understanding of the interplay between the evolution of faunal communities and depositional systems.