Genetic types of basal conglomerate of the Changzhougou Formation in the central sector of the Yanshan Mountains
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摘要: 根据底砾岩的砾石成分、结构、分布、产状及沉积相序等特征，将燕山中段常州沟组底砾岩分为冲积扇沉积、河流沉积、扇三角洲沉积、海滩沉积等４种成因类型，并探讨了常州沟早期燕山盆地的岩相古地理格局。Abstract: According to the gravel composition, textures, distribution,occurrence and sedimentary facies sequence, basal conglomerate of the Changzhougou Formation in the central sector of the Yanshan Mountains may be classified according to its geneses into the alluvial fan sedimentary type, fluvial sedimentary type, fan delta type, and beach sedimentary type. The paper also discusses the facies paleogeographic framework of the early Changzhougou’an Yanshan basin.
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Key words:
- basal conglomerate /
- genetic type /
- Changzhougou Formation /
- Yanshan Mountains
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