, 1996, Multiple Classification and Correlation of the Stratigraphy of China (64), Stratigraphy (Lithostratic) of Ningxia Hui Autonomous Region, Wuhan: China University of Geosciences Press, 18 ➂Taosigou, west of Shitanjing, Shizuishan City, Ningxia Hui Autonomous Region ➃For grayish white, ...