重庆北碚长兴期腕足动物群落的划分及其地层意义  

CHANGHSINGIAN BRACHIOPOD PALEOCOMMUNITIES IN BEIBEI,CHONGQING AND THEIR BIOSTRATIGRAPHIC SIGNIFICANCE

作　　者：曾勇[1] 王茵[1] 陈松[1] 

机构地区：[1]中国矿业大学资源与地球科学学院

出　　处：《地层学杂志》2008年第1期85-90,共6页Journal of Stratigraphy

基　　金：现代古生物学和地层学国家重点实验室资助课题(No.073109)

摘　　要：重庆北碚地区晚二叠世长兴期地层出露良好,剖面位于北碚代家沟东北部,经过详细调查研究,在厚度为110.5m的长兴组石灰岩地层中发现有丰富的腕足动物,共有28属46种。按照识别与划分化石群落的5个基本条件,本区长兴期腕足动物可以划分为3个化石群落,本区长兴期生态地层建立3个化石群落带,自上而下为:Uncinunellina-Peltichia带、Haydenella-Perigeyerella带、Oldhamina-Meekella带。从而将本区长兴期地层三分。The Upper Permian Changhsingian succession is well exposed in the northeast Beibei, Chongqing City. Base on materials collected froma section near Daijiagou, a detailed investigation has been conducted to study the lithostratigraphy and biostratigraphy of the Changhsing Formation. With a thickness of about 110.5m, the Changhsing Formation in this area is composed primarily of carbonate rocks rich in brachiopod fossils. 46 species belonging to 28 genera were identified. The authors used 5 criteria to distinguish brachiopod palaeocommunities. Three brachiopod palaeoeommunities are recognized in the Changhsing Formation of the Beibei area. Three palaeocommunity ecostratigraphic zones are identified. These are, in descending order, the Uncinunellina-Peltichia palaeocommunity zone, the Haydenella-Perigeyerella palaeocommunity zone, and Oldhamina-Meekella palaeocommunity zone.

关 键 词：腕足动物 化石群落带 长兴期 二叠纪 北碚 重庆 

分 类 号：P534.46[天文地球—古生物学与地层学]