Gray-black oil shale and black charcoal shale were high quality source rocks in Jurassic system comparatively.

灰黑色油页岩及黑色炭质页岩是侏罗系中的优质烃源岩。

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Gray-black oil shale and black charcoal shale were high quality source rocks in Jurassic system comparatively.

灰黑色油页岩及黑色炭质页岩是侏罗系中的优质烃源岩。

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