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