摘要
本文研究了青海省中奥陶世至早三叠世的牙形剌化石,依据其产出层位自下而上可划分为六个组合Ⅰ中奥陶世 Pygodus anserinus 组合;Ⅱ中—晚泥盆世 Icriodus expansus 组合;Ⅲ早石炭世 Gnathodus bilineatus 组合;Ⅳ晚石炭世 Streptognathodus elegantulus 组合;Ⅴ早二叠世 Sweetognathus whitei 组合;Ⅵ早三叠世 Neospathodus homeri 组合。此牙形剌组合,既丰富了我省古生代及三叠纪的古生物资料,又为相应地层的划分、对比提供了重要依据。
The eoriodont fossils of middle Ordovician-early Triassic from Qinghai province have been studied in thispaper,and then according to their horizons the six assenblages from the lower to the upper can be identified as follows:Ⅰ Pygodus anserinus assemblage of middle OrdovicianⅡ Icriodus expansus assemblage of middle—upper DevonianⅢ Gnathodus bilineatus assemblage of lower CarboniferousⅣ Strejptognathodus elegantulus assemblage of upper CarboniferousⅥ Sweetognathus assemblage of lower PermianⅦ Neospathodus homeri assemblage of lower TriassicThe discovery of these conodont assemblages not only enriches the palaeontological material of. the province frompalaeozoic era to Triassic Period,but also provides an important basis for dividing and comparing strata.
出处
《青海地质》
1992年第1期9-14,T003,共7页
关键词
古生代
早三叠世
牙形刺
组合
青海
Qinghai province middle Ordovicia——early Triassic Conodont Assemblages
