They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.
碎屑岩以砂岩
，
中又以石英砂岩和岩屑砂岩，缺少长石砂岩。
They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.
碎屑岩以砂岩，中又以石英砂岩和岩屑砂岩，缺少长石砂岩。
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