亚智梁阶
是中国海相上三叠统下部的一个阶。层型剖面位于西藏聂拉木土隆村西南侧山坡上。亚智梁阶的底界以牙形石Paragondolella polygnathiformis的首现为标志(比传统以菊石Trachyceras aon定义的底界要稍低)。阶内含一个牙形石带Paragondolella polygnathiformis带，该带的顶、底(首现和消失)分别标志本阶的顶、底界；本阶内自下而上包含四个菊石带：TrachycerasDisctopites带，Indonesites dieneri带，Hoplotropites带和Parahauerites acutus带。
Classification(s)
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Geographic semantic resource library Earth System(in Chinese) Geostratigraphic stratigraphy
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| English |
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| Name | Yazhiliangian Stage |
| Chinese |
|---|
| Name | 亚智梁阶 |
| Description | 是中国海相上三叠统下部的一个阶。层型剖面位于西藏聂拉木土隆村西南侧山坡上。亚智梁阶的底界以牙形石Paragondolella polygnathiformis的首现为标志(比传统以菊石Trachyceras aon定义的底界要稍低)。阶内含一个牙形石带Paragondolella polygnathiformis带，该带的顶、底(首现和消失)分别标志本阶的顶、底界；本阶内自下而上包含四个菊石带：TrachycerasDisctopites带，Indonesites dieneri带，Hoplotropites带和Parahauerites acutus带。 |
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NNU_Group (2011). 亚智梁阶, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/c52bfdde-58a4-4073-8630-4d6794c276b9
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