这一结论在西北地区侏罗纪煤系含油气盆地具有普遍性。
This is a common conclusion for the Jurassic coal bearing basins in the Northwest China.
中国北方石炭二叠纪和侏罗纪煤系中普遍产出一种可塑性极高的软质粘土，又称木节土，其矿物组成以高岭石为主。
A kind of high plasticity soft-clay, also called kibushi clay, is widely deposited in Carboniferous-Permian and Jurassic coal-bearing strata in northern China.
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