紫阳阶

是中国下志留统上部的一个阶,位于大中坝阶之上,中志留统下部的安康阶之下,层型剖面位于陕西紫阳西南10千米芭蕉口的麻柳树湾至仙中沟口。紫阳阶的底界以笔石Spirograptus guerichi的首现为标志。阶内自下而上包括九个笔石带:①Spirograptus guerichi带,②Spirograptus turiculatus带,③Monograptus crispus带,④Streptograptus exiguus带,⑤Monoclimacis griestoniensis带,⑥Torguigraptus tullbergi带,⑦Oktavites spiralis带,⑧Cyrtograptus lapworthi带,⑨Cyrtograptus sakmaricus带。

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Contributor(s)

Initial contribute: 2011-10-11

Classification(s)

Geographic semantic resource libraryEarth System(in Chinese)Geostratigraphic stratigraphy

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English
Name Ziyangian Stage
Chinese
Name 紫阳阶
Description 是中国下志留统上部的一个阶,位于大中坝阶之上,中志留统下部的安康阶之下,层型剖面位于陕西紫阳西南10千米芭蕉口的麻柳树湾至仙中沟口。紫阳阶的底界以笔石Spirograptus guerichi的首现为标志。阶内自下而上包括九个笔石带:①Spirograptus guerichi带,②Spirograptus turiculatus带,③Monograptus crispus带,④Streptograptus exiguus带,⑤Monoclimacis griestoniensis带,⑥Torguigraptus tullbergi带,⑦Oktavites spiralis带,⑧Cyrtograptus lapworthi带,⑨Cyrtograptus sakmaricus带。

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NNU_Group (2011). 紫阳阶, Concept & Semantic, OpenGMS, https://geomodeling.njnu.edu.cn/repository/concept/68d8a1fe-405b-4871-8fe1-f43351a2ac23
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Contributor(s)

Initial contribute : 2011-10-11

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