• A large amount of burrow fossils are found in pelitic siltstone in the middle Changzhougou Formation of the Mesoproterozoic in the Yanshan area.

    燕山地区古代常州沟组中发育大量化石,潜穴产于常州沟组中部的泥质粉砂岩中。

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  • Its main rocks is the metamorphic pelitic siltstone, the feldspathic quartz wacke, the fine sandial feldspathic quartz siltstone, the feldspathic wacke and the sericite quartz phyllite etc.

    主要岩性有变泥质粉砂岩长石石英砂岩细砂质长石石英粉砂岩、长石杂砂岩、云石英千枚岩

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  • Its main rocks is the metamorphic pelitic siltstone, the feldspathic quartz wacke, the fine sandial feldspathic quartz siltstone, the feldspathic wacke and the sericite quartz phyllite etc.

    主要岩性有变泥质粉砂岩长石石英砂岩细砂质长石石英粉砂岩、长石杂砂岩、云石英千枚岩

    youdao

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