粉砂岩
一种细碎屑岩，其中粒径为0.025～0.0039毫米的粉砂的含量占50%以上，其余为砂、粘土或化学沉淀物。粉砂的成分以石英为主，其次为白云母和长石，岩屑少见，重矿物含量比砂岩多，可高达2%～3%。碎屑的磨圆度不好，常呈棱角状。胶结物以钙质、铁质为主。红层及煤系地层中经常遇到粉砂岩，黄土也是一种疏松或半固结的粉砂沉积物。
Classification(s)
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Geographic semantic resource library Earth System(in Chinese) Sedimentology and sedimentary petrology
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| English |
|---|
| Name | siltstone |
| Chinese |
|---|
| Name | 粉砂岩 |
| Description | 一种细碎屑岩，其中粒径为0.025～0.0039毫米的粉砂的含量占50%以上，其余为砂、粘土或化学沉淀物。粉砂的成分以石英为主，其次为白云母和长石，岩屑少见，重矿物含量比砂岩多，可高达2%～3%。碎屑的磨圆度不好，常呈棱角状。胶结物以钙质、铁质为主。红层及煤系地层中经常遇到粉砂岩，黄土也是一种疏松或半固结的粉砂沉积物。 |
{{htmlJSON.HowtoCite}}
null (2011). 粉砂岩, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/e88e6f38-ceec-488c-bc30-3a628a9f8111
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