The finer layers generally consist of carbonaceous clay, mild clay and silty sand, showing characteristics of lacustrine sedimentation.
细粒层均为含炭的粘土、亚粘土和粉砂，具湖塘相沉积的特点。
The finer layers generally consist of carbonaceous clay, mild clay and silty sand, showing characteristics of lacustrine sedimentation.
细粒层均为含炭的粘土、亚粘土和粉砂，具湖塘相沉积的特点。
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