摘要
本文总结出黔西南长兴期10个典型的化石群落,并讨论了它们所代表的环境。对10个群落的独立存在、相邻群落顺序出现的关系及环境解释的可信性,使用了聚类分析、可置换性分析、相同属(种)概率分析等方法进行检验。根据群落分析,对横越黔西南的5个剖面进行了生态地层划分及对比,发现该区在长兴期经历了3次海平面升降,并根据海侵海退峰值划出7条近等时线,提高了异相同时地层对比的精确性。
Ten Changxingian fossil communities are established according to their separable and characteristic assemblages which re-appear in many sections.Independence of the ten communities, their mutual relations ( successive appearance, etc. ) and the convincingness of their environmental interpretations are investigated by using mathematic methods including cluster analysis, interchangeable analysis and probability analysis of the genera and species.Ecostratigraphic subdivision and correlation of five sections transversing Southwest Guizhou (Fig.4, 5)revealed that this region underwent three episodes of eustatic vibration, and seven para-isochronous lines can be drawn to correlate the facially different strata.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1991年第2期127-135,共9页
Earth Science-Journal of China University of Geosciences
基金
国家教委博士基金课题"黔南桂北二叠三叠系生态体系及控矿背景"的部分成果
关键词
生态地层
长兴期
化石
群落划分
Southwest Guizhou, Changxingia, community analysis,ecostrati-graphy, paleogeography.
