Sedimentary facies types and distribution characteristics of Upper Cretaceous Qingshankou Formation shale strata in Changling Sag, Songliao Basin

DONG Qinwei1, 2, MENG Qingtao1, 2, WANG Ying1, HU Fei1, 2, YU Hao1, 2, TANG Baiqiang1, 2, ZHANG Enwei1, 2
World Geology . 0, (): 1 .