After studying Paleontology, geochemistry and sedimentology, it is considered that the sedimentary environment of study area is offshore pericontinental lake in Late Permian.

• 此套地层的成因与海洋有关。综合古生物、地球化学、沉积等特征认为本区晚二叠世为近海陆缘湖泊沉积环境。