湖北宜昌真金和陈家河奥陶系牯牛潭组至宝塔组的牙形刺及其地层意义
根据采自湖北宜昌分乡陈家河和远安真金两剖面奥陶系牯牛潭组至宝塔组的牙形刺,将该段地层的牙形刺生物带自上而下综合划分为Hamarodus brevirameus,Amorphognathus superbus,Baltoniodus alobatus,Pygodus anserinus-Yangtzeplacognathus jianyeensis,Yangtzeplacognathus protoramosus,Yangtzeplacognathus foliaceus, Histiodella kristinae-Eoplacognathus suecicus,Dzikodus tablepointensis,Lenodus variabilis 和Lenodus antivariabilis等牙形刺生物带.其中宝塔组之Hamarodus brevirameus,Amorphognathus superbus 生物带及Baltoniodus alobatus生物带顶部归为凯迪阶(Katian),庙坡组Baltoniodus alobatus 生物带大部和Pygodus anserinus-Yangtzeplacognathus jianyeensis生物带中上部归为桑比阶(Sandbian),而牯牛潭组的Yangtzeplacognathus protoramosus至Lenodus antivariabilis等牙形刺生物带和庙坡组Pygodus anserinus-Yangtzeplacognathus jianyeensis生物带下部则归入达瑞威尔阶(Darriwillian).这一牙形刺带序列与宜昌黄花场和分乡剖面的牙形刺生物带相一致.
牙形刺、牯牛潭组、宝塔组、奥陶系、宜昌真金、陈家河、湖北
35
Q913;P534;P619.211
2018-08-27(万方平台首次上网日期,不代表论文的发表时间)
共17页
13-29