Author(s): GONG Liming1), WANG Chengyuan2, 3), WANG Changsheng4), HU Yunxi1), TANG Yongyang1), HU Ping1) and WANG Qingdong1) 1) Geological Team of SE Sichuan, Chongqing City Bureau of Geology and Mineral Resources, Chongqing 400030 2) College of Paleontology, Shenyang Normal University, Shengyang 110034 3) Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008 4) School of Tourism and Land Resource, Chongqing Technology and Business University, Chongqing, 400067
Pages: 282-298
Year: 2012 Issue:  3
Journal: Acta Micropalaeontologica Sinica
Keyword:  牙形刺;  写经寺组;  法门期早期;  弗拉斯期;  穿时;  渝东南地区;
Abstract: 本文研究了渝东南地区3个泥盆纪剖面的牙形刺,黔江濯水剖面的顶部(第7层)产有Palmatolepis quadrantinodosalobata等牙形刺,时代为法门期早期Middle crepida带至Lower rhomboidea带,是本区泥盆纪海相沉积的最高层位;酉阳兴隆剖面(第51层)发现牙形刺Palmatolepis semichatovae等牙形刺,时代为弗拉斯期晚期Lower rhenana带;濯水剖面的5层和6层、黔江水泥厂剖面的5层至7层以及酉阳兴隆剖面的52层和53层均产有较多的弗拉斯期晚期的牙形刺。本区写经寺组、黄家磴组和云台观组都可能是穿时的,写经寺组在各剖面残留厚度不同。写经寺组的时代为弗拉斯期晚期至法门期早期。本区缺少法门期中、晚期的典型的海相沉积。描述了一个新种Polygnathus chongqingensis Wang sp.nov.。