四川龙门山区早泥盆世Emsian期群落划分  

COMMUNITY DIVISION IN EMSIAN STAGE OF EARLY DEVONIAN FROM MT.LONGMEN,SICHUAN PROVINCE

作　　者：李祥辉[1] 陈源仁[1] 

机构地区：[1]成都地质学院

出　　处：《成都地质学院学报》1993年第2期48-56,共9页

基　　金：国家自然科学基金

摘　　要：通过对龙门山区8个具有代表性剖面的测量与研究,依据化石的重现组合规律,划分出早泥盆世Emsian期地层中以腕足动物为主的8个底栖群落。The Emsian of early Devonian deposited by a transgressive sequence is composed of inner shelf dominative respectively in both terrigenous clastics and platform. In this paper, eight benthic communities in Emsian that are substantially involved in brachiopods are recognized as a fossil association in space-time of the population on the basis of field data with a multiple analysis-components of benthos, tendencies of abundances and diversities, data processed on APPLE-Ⅱ etc. These communities are included: Neoathyrisina community; Rostrospirifer tonkinensis-Dicoelostrophia punctata community; Euryspirifer paradoxus community; Otospirifer xiejiawanensis community; Euryspirifer yanmenbaensis-kwangsia yohi community; Desquamatia sp. A-Megastrophia ertaiziensis community; Otospirifer sp. C-Favositeds community;? Xenospirifer fongi-Atryparia-Athyrisina community

关 键 词：Emsian期 生态地层 腕足动物 

分 类 号：Q915.644[天文地球—古生物学与地层学]