论Cystophrentis带的时代

<正> 1931年,俞建章教授建立了华南区下石炭统的四个珊瑚化石带,即Cystophrentis带,Pseudouralinia带,Thysanophylloides(原称Thysanophyllum)带和Yuanophyllum带,分别代表革老河灰岩、汤粑沟砂岩、旧司砂岩和上司灰岩。Cystophrentis及其所代表的相关地层在华南浅水相区有广泛的分布。湖南、贵州、广西、广东、四川等地,均有Cystophrentis产出。而它所代表的地层时代,俞建章(1931,1937,1963,1979)、吴望始(1964,1974,1981)、张良(1985)的研究,代表我国早石炭世早期的沉积。吴望始等(1981)研究了位于孟公坳组之下的邵东组的珊瑚,她将邵东组的珊瑚分为两个带,即下部的Ceriphyllum elegatum带和上部的Caninia dorlodoti带,代表华南早石炭世最早期的沉积,这样更使邵

On the age of Cystophrentis Zong

Cystophrcntis Zone has been considered by all the Chinese geologists to be Early Carboniferous since it was established in 1931. But Cystophrentis was commonly associated with Icriodus costatus, 1, raymondi, Polygnathus obliquicostatus (Conodonts) Quasiendothyra kobeitusana, Q. radiata, Q. coin-munis, Q, kpnensis (Foraminifers), Valliatis porites pttsillites, Retispora lepidobhyta (Spores). All the fossils listed above indicated that the Cystophrentis Zone is undoubtedly Late Devonian.