【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。更多还原

【Abstract】 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更多还原