【摘要】 鄂尔多斯东北缘东胜地区下白垩统的地层划分一直存在分歧。依据地层的沉积成因及保存特征 ,通过地层的相变关系及其对比分析 ,指出了东胜组和伊金霍洛组划分方案的不合理性 ,提出了该区下白垩统划分可采用三普的命名与划分方案更多还原

【Abstract】 There have been different opinions on the Lower Cretaceous stratigraphic division of the Dongsheng area, on the northeastern margin of Ordos Basin for a long time. On the basis of the researches on depositional genesis, occurrence state and facies change of the strata, as well as stratigraphic correlation, we think that the present division of the Lower Cretaceous into the Dongsheng and Yijinhuoluo Formations is unsuitable. A new and more reasonable divisional scheme on the Lower Cretaceous of the area is suggested in this paper.更多还原