They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.
碎屑
以
类
主，其中又以
英类和屑类主，缺少长类。
They mainly consist of sandstone,in which quartzarenite and litharenite are dominant and arkose is lack.
碎屑以类主，其中又以英类和屑类主，缺少长类。
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