中国扬子海盆奥陶纪末期生物集群绝灭事件Terminal Ordovician mass extinction event in the Yangtze Basin of China
李积金,王琨,B.D.E.查特顿
摘要(Abstract)：
<正> 近年来,奥陶纪末期生物集群绝灭事件的研究,越来越为人们所关注。Raup和Sepkoski(1982)认为,在晚奥陶世大约有22％科的生物绝灭,是显生宙生物集群绝灭5个最大幕之一。这次事件造成了所有海洋无脊椎动物的分异度和丰度的降低。Brenchley(1990)把晚奥陶世绝灭的若干类群的重要变化作了如下概述:阿什极尔中期的38科三叶虫,仅有14科存活到志留纪;在或接近奥陶-志留系界线,有13科腕足类绝灭,27科穿
关键词(KeyWords)：
基金项目(Foundation):
作者(Author): 李积金,王琨,B.D.E.查特顿
DOI: 10.19839/j.cnki.dcxzz.1993.04.008
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