Upper Jurassic red bed cover directly on coal measure strata of Permian and Carboniferous system in Yanzhou coal field.
兖州煤田的上侏罗统红层直接覆盖于二叠、石炭系煤系地层之上。
There are fine local cap formations existing in upper and lower Youshashan formation of Jurassic system.
侏罗系，下油砂山组，上油砂山组存在较好的局部盖层。
There are fine local cap formations existing in upper and lower Youshashan formation of Jurassic system.
侏罗系，下油砂山组，上油砂山组存在较好的局部盖层。
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