摘要
本文从牙形类生物地层研究,尤其是管刺(siphondella)属的演化出发,再次探讨八十年代以来,我国黔南,桂北,粤北,湘中南,鄂西,)川西及塔北等地14条浅水相(腕足珊瑚相)泥盆—石炭系界线剖面的划分成果。提出浅水相的Siphonodella4个生物地层序列,并可用其中Si.levis对应于已被国际公认的Si.Sulcota作为浅水相区分界的标准,其首见层位跨于珊瑚Cystophrentis带内。如果同时考虑其它多项地学因素,则应求同存异通过会议协商定案。笔者认为:界线宜划在邵东组,者王组及其相当地层组顶部。
On the basis of researches on the shallow water facies biostratigraphy bearing conodont and on the development of Siplnmodella, this paper sums up and approaches again the division results gained in 80, s of fourteen boundary sections of shallow water facies Devonian and Carboniferous in South Guizhou, Northern Guangxi, Northern Guangdong, Central Southern Hunan, Northern Hubei, Northern Sichuan, etc. The paper suggests settingup four biostratigraphical Siphanodella sequences of shallow water facies and using Si. levis coresponding to internationally recognized Si. sulcata as the standards of boundary divisions of shallow water facies, with the first seen sequence across within the zone of Cystophrentis. The author thinks that it is better for boundary lines to be marked on the tops of Shaodong formation, Zhewang formation and their equivalent stratum formations.
出处
《贵州地质》
1990年第4期303-312,共10页
Guizhou Geology
