古-中生代之交的全球变化与生物效应

来源 :地学前缘 | 被引量 : 19次 | 上传用户：taishengqi_1

【摘要】

：

古—中生代之交是显生宙以来最大的一次生物绝灭期 ,其形成机制一直是地学界长期探讨的热点课题之一。地史重大转折期是地球内、外各圈层长期作用下 ,各种量变达到阀值 ,加之可能的外因激化 ,在短时间内以连锁反应形式相继质变 ,形成了全球变化 (包括生物绝灭 )的地球突变期。文中从可能的外因 (外星体撞击事件 )及内因 (岩石圈的变化 ,地球表层的变化和生物圈的变化 )两个方面探讨了古—中生代之交的全球变

【作者】

：

彭元桥殷鸿福

【机构】

：

中国地质大学地球科学学院,中国地质大学地球科学学院湖北武汉430074,湖北武汉430074

【出处】

：

地学前缘

【发表日期】

：

2002年03期

【关键词】

：

古-中生代界线生物集群绝灭事件岩石圈地球表层生物圈

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古-中生代之交的全球变化与生物效应

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