Foraminifera distribution of provinces in the Gulf of Mexico
Foraminifera distribution of provinces in the Gulf of Mexico
复制标题
墨西哥湾各省有孔虫分布
作者：
S. Culver;M. Buzas
最近底栖有孔虫的分布模式构成了地质学家使用的许多古环境(特别是古大地测量)解释的基础。我们最近总结了北美大西洋大陆边缘近期底栖有孔虫的分布1，2并报告了对墨西哥湾所有已公布数据的分析结果。为了获得墨西哥湾有孔虫分布的综合情况，编制了一份所有已公布事件(有无数据)的计算机化目录。对这些数据的聚类分析分离出四个与墨西哥湾水团表现出空间相关性的大的、略有重叠的地区或省。在密西西比三角洲河口发现了第五个较小的离散区域(生物相)。
Recent benthic foraminifera distribution patterns form the basis of much palaeoenvironmental (particularly palaeobathymetric) interpretation used by geologists. We have recently summarized the distribution of recent benthic foraminifera on the Atlantic continental margin of North America1,2 and report here the results of an analysis of all published data from the Gulf of Mexico. To obtain a synthesis of foraminiferal distribution in the Gulf of Mexico, a computerized catalogue of all published occurrences (presence or absence data) was compiled. Cluster analysis of these data isolated four large, marginally overlapping areas or provinces exhibiting a spatial correlation with Gulf of Mexico water masses. A fifth, smaller, discrete area (biofacies) was found at the mouth of the Mississippi delta.