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

RUI：科罗拉多州寒武纪-奥陶纪内陆架综合地层学和沉积学分析

• 批准号: 9419141
• 负责人: Paul Myrow
• 金额: $ 9.08万
• 依托单位: Colorado College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-15 至 1998-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9419141&HistoricalAwards=false
• 关键词: RUI; Integrated; Stratigraphic; Sedimentological; Analysis

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.

9419141 Myrow，毒性流动间隔（包括重大灭绝）与最终可能控制这些事件的各种沉积和构造过程之间的关系对于对地层记录的整体理解至关重要。 对系统动力学进行完整分析，需要在陆上岸剖面中所有地区的沉积学，古生物学和地层数据的整合。 Cambro-Ordovician边界间隔记录了几个动物周转事件，包括在Proavis Conodont区域的核心底部的重大灭绝，由于较差的生物地层分辨率，在北美内部碎屑带沉积物中通常无法识别或未保存。 来自文献记载的坎伯罗 - 山台平台和大盆地和其他地方的近海地区的沉积学和生物地层数据已用于提出针对动物灭绝的工艺 - 响应模型，在许多情况下，这些模型包括化学的狂欢“事件”。 不幸的是，关于动物更新间隔与沉积和构造事件的间隔有关的近端肉体沉积物的信息很少或根本没有信息，这可以用作灭绝原因或拟议狂热事件的全球相关性的测试。 科罗拉多州中部和西部科罗拉多州中部和西部的较厚的粘液式硅胶和碳酸盐岩石岩石为评估在北美北美坎布罗 - 北美的Cambro-ododovician中，在动植物周转期间和之间的沉积周期内和生物术语中的空间转移事件中，为空间和时间变化提供了一个绝佳的机会。 提出了一个为期两年的沉积学和地层研究，其中使用Conodont BioStratigraphy和Satementologicy标准对不合格材料的识别将首次构建科罗拉多州的Cambro-Ordovician。这些沉积物的系统动力学与有据可查的舷外演讲的范围将有助于更完整地了解动物群落的演变与沉积系统之间的相互作用。