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豫西地区主要发育有东西向、北西向和北东向三组断裂，分别为印支—燕山早中期、燕山晚期和喜山期构造运动的产物。这三组断裂控制着盆地边界和盆地内的局部构造，并对上三叠统地层的剥蚀也有一定的控制作用，尤其是硖石—陈宅沟、硖石—石门断裂对上三叠统地层的保存影响较大。在其下盘，上三叠统地层保存良好，在其上盘即推覆体上，上三叠统地层往往遭受严重剥蚀。上三叠统地层主要分布在伊川盆地彭婆凹陷、洛阳盆地的洛阳凹陷和宜阳凹陷石陵次凹，其他地区三叠系地层剥蚀殆尽．
There are mainly three types of faults, east-west, north-west and north-east, in western Henan, which are the products of tectonic movement in Indosinian-Yanshanian, mid-Yanshanian and Himalayan respectively. These three faults control the local structures in the basin boundaries and basins, and also control the denudation of the Upper Triassic strata. In particular, the Jieshi-Chenzhaigou and Jieshi-Shimen faults are of great significance to the Upper Triassic strata The preservation of a greater impact. On its lower plate, the Upper Triassic strata are well-preserved, and the Upper Triassic strata often suffer serious erosion on their upper plate, the nappe. The Upper Triassic strata are mainly distributed in the Pengpo Sag of the Yichuan Basin, the Luoyang Sag in the Luoyang Basin and the Shiling Sag in the Yiyang Sag, and the Triassic strata in other areas are denuded depleted.