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

小行星9418863 该项目旨在根据内华达、西班牙、奥地利和波希米亚材料的地层剖面和分类学研究，对下泥盆统的洛赫科夫阶和普拉格阶进行综合生物地层分区。 它将把牙形石和笔石这两个最有用的类群的生物地层学与腕足动物、介形虫、微脊椎动物、三叶虫、dacryoconarids的生物地层学以及目前已知的珊瑚地层学结合起来。 该项目必然依赖于各机构之间的密切合作。 这项研究将通过应用Shaw的图形相关方法来整合各种生物地层学，该方法被修改为在开发下泥盆统（lochkovian-Pragian）的复合剖面时更有力地加权分类群的进化外观，该剖面可用于该区间内的年代地层学解释。 大多数地层学问题基本上取决于能否确定所研究地层的相对年龄。 该项目将寻求建立一个全球有用的生物地层学工作的比较标准，并在Lochkovian-Pragian间隔的相对年龄测定。 由于现有的数据库和关键人员的情况，现在可以这样做。

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.