Integrated Biostratigraphic Standard of Reference for the Lochkovian-Pragian (Lower Devonian) Using Correlated Lineage Studies

该项目旨在根据内华达、西班牙、奥地利和波西米亚材料的地层剖面和分类研究，建立下泥盆纪Lochkovian和Pragian阶段的综合生物地层学带。它将把牙形刺和笔石这两个最有用的类群的生物地层学与目前已知的腕足类、介形类、微脊椎动物、三叶虫、锥虫和珊瑚的生物地层学结合起来。该项目必须依靠两国各机构的密切合作。该研究将通过应用Shaw的图形对比方法来整合各种生物地层学，以更强烈地加权分类群的进化外观，从而形成下泥盆统（lochkovian-Pragian）的复合剖面，该剖面可用于区间内的年代地层解释。大多数地层学问题从根本上取决于能否确定所研究地层的相对年龄。该项目将寻求为生物地层工作和Lochkovian-Pragian区间的相对年龄定年建立一个全球有用的比较标准。由于现有的数据库和关键人员的情况，现在可以做到这一点。

9418863 Murphy This project seeks to develop an integrated biostratigraphic zonation of the Lochkovian and Pragian Stages of the Lower Devonian based on stratigraphic sections and taxonomic studies of Nevadan, Spanish, Austrian, and Bohemian material. It will integrate the biostratigraphies of the two most useful groups, the conodonts and the graptolites, with the biostratigraphies of the brachiopods, ostracodes microvertebrates, trilobites, dacryoconarids, and corals stratigraphies as they are currently known. The project necessarily depends on a close collaboration in their various institutions. The study will integrate the various biostratigraphies through application of Shaw's method of graphic correlation modified to weight evolutionary appearance of taxa more strongly in developing a composite section for the Lower Devonian (lochkovian-Pragian) that may be used for chronostratigraphic interpretation within the interval. Most stratigraphic problems depend fundamentally on being able to assign relative ages to the strata being studied. This project will seek to set up a globally useful standard of comparison for biostratigraphic work and relative age dating in the Lochkovian-Pragian interval. This is now possible because of the present data base and circumstances of key personnel.