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冀北滦平张家沟大北沟组-大店子组的剖面连续、沉积序列完整、介形类化石十分丰富,可分为:Ⅰ.Luanpin gella-Eoparacypris-Pseudop......
The Triassic is the most important oil producing strata in the Ordos Basin.Although the reservoirs of the Triassic Chang......
