Taphonomic Perspectives of Carbonate Sedimentation, Graham's Harbor

将进行一项为期18个月的现代海洋碳酸盐环境中地层学和沉积学过程研究。pi将评估巴哈马格雷厄姆港六种不同环境的生物、物理和沉积学特征。本研究的目的是(1)对比和比较Graham's Harbor内各种碳酸盐环境的物种损失率与沿德克萨斯海岸测量的损失率——碎屑环境中的损失率与碳酸盐环境中的损失率是否不同？碳酸盐岩环境的损失率可能低于碎屑环境。如果损失率更低，那么死亡组合和通过分析，化石记录可能包含更多的原始思想。(2)在一个非常精细的环境尺度上识别运输组合——我们将量化格雷厄姆港栖息地之间和内部的运输。在本研究中发展和完善的技术可以应用于化石露头分析。(3)生物群落和死亡组合的大小频率分析——碳酸盐死亡组合是否比碎屑环境更准确地反映了生物群落的种群动态？(4)对Graham’s Harbor 6种不同环境的生物群进行地学特征分析，并与沉积记录进行比较。沉积参数对埋藏学性质的反映有多密切？

An eighteen month study of taphonomic and sedimentologic processes in a modern marine carbonate environment will be conducted. PIs will assess the biologic and physical and sedimentologic characteristics of six diverse environments in Graham's Harbor, Bahamas. The objectives of the study are (1) to contrast and compare rates of taphonomic loss from a variety of carbonate environments within Graham's Harbor with those measured rates along the Texas coast--are loss rates in clastic environments different than those in carbonate environments? Loss rates in carbonate environments may be less than in clastic environments. If loss rates are less, then the death assemblage and by analyogy, the fossil record, might contain more of the original thought. (2) to recognize transported assemblages on a very fine environmental scale--we will quantify transport between and within habitat in Graham's Harbor. The techniques developed and perfected in this study should be transferable to the analysis of fossil outcrops. (3) size frequency analysis of the living community and death assemblage--do carbonate death assemblages contain a more accurate representation of the population dynamics of the living community than in clastic environments? (4) Taphonomic signatures of the biota from six distinct environments in Graham's Harbor will be determined and compared with the sedimentary record. How closely do sedimentologic parameters reflect taphonomic properties?