Facies Generation, Transformation and Destruction by Repetitive Excavation and Infilling of Burrow Networks

挖掘穴居人对许多人产生了压倒性的影响， 整个中生代的沉积序列。 洞穴 挖掘过程加上随后的风暴填充， 开放的洞穴网络导致（1）闭塞或 前兆层序转换;（2）地下生成 沉积相和分层的研究;（3） 保存的沉积组构和动物群组合， 既不是前体相的直接反映， 表层沉积条件、结构和组构。 利用传统方法分析受影响的沉积层序 地层学、沉积学和古生态学原理将 对古环境产生误导性的解释 条件和序列演化。 该项目将以 受影响的现代社会的变化的性质、程度和速度 序列，并制定和测试识别标准， 重新评价受影响的古沉积序列。 的 南部碳酸盐陆棚、泻湖和泥滩环境 佛罗里达将作为现代部分的研究领域， 研究计划。 应用于古代序列将使用 石灰岩泻湖、陆棚、泥滩和土墩沉积物 得克萨斯州的早白垩世、堪萨斯的宾夕法尼亚纪和 新墨西哥州的密西西比人。 结果将影响 古岩序的环境解释及 评估其碳氢化合物潜力。

Excavating burrowers exert an overwhelming influence on many sedimentary sequences throughout the Phanerozoic. Burrow excavation processes coupled with subsequent storm infilling of open burrow networks results in (1) obliteration or transformation of precursor sequences, (2) subsurface generation of depositional facies and stratification and (3) production of preserved depositional fabrics and faunal assemblages that are not a direct reflection of either precursor facies or the surficial depositional conditions, textures and fabrics. Analysis of affected sedimentary sequences using traditional stratigraphic, sedimentologic and paleoecologic principles will produce misleading interpretations of paleoenvironmental conditions and sequnce evolution. This project will characterize the nature, extent and rate of modification in affected modern sequences and develop and test criteria for recognition and reevaluation of affected ancient sedimentary sequences. The carbonate shelf, lagoonal and mudbank environments of south Florida will serve as study areas for the modern portion of this research program. Application to ancient sequences will use limestone lagoonal, shelf, mudbank, and mound deposits of the Lower Cretaceous of Texas, Pennsylvanian of Kansas and the Mississippian of New Mexico. Results will affect the environmental interpretation of ancient rock sequences and the assessment of their hydrocarbon potential.