Those of the fluvial facies, especially the lacustrine facies and palaeosols, are mainly composed of very fine sands and also contain some quantities of silt and clay.
河流相、特别是湖沼相与古土壤以极细砂含量占优势，且具一定含量的粉砂和粘土。
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 geochemical characteristics of inclusion and clay-adsorbed oils correlate well with the lacustrine mudstones.
油气包裹体和粘土吸附油气组分具有明显的湖相泥岩地球化学特征。
The geochemical characteristics of inclusion and clay-adsorbed oils correlate well with the lacustrine mudstones.
油气包裹体和粘土吸附油气组分具有明显的湖相泥岩地球化学特征。
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