CRYOGENIAN, EDIACARAN, AND CAMBRIAN STRATIGRAPHY IN DEEP-WATER FACIES OF THE YANGTZE PLATFORM AT WUHE, TAIJIANG COUNTY, GUIZHOU PROVINCE, CHINA

摘要

The Cryogenian-Ediacaran-Cambrian strata in the Wuhe section, Guizhou Province, are exposed along the Qingshui River from Wuhe to Gedong, Taijiang County (Fig. 1). Paleogeographically, the Ediacaran-Cambrian strata in the Wuhe section are within the Jiangnan Slope Belt, representing the typical transitional facies between the Yangtze Platform and the Jiangnan Basin (Zhou et al., 1979; Zhu et al., 2001). The section starts in the upper part of the Nantuo Tillite. Succeeding strata consist of, in ascending order, the Toushantuo (Doushantuo) Formation, Tongying Formation, Liuchapo Formation, Jiumenchong Formation, Bianmachong Formation, Balang Formation, Tsinghsutung (Qingxudong) Formation, Kaili Formation, Jialao Formation, and the Loushanguan Formation (Figs. 2, 3). The section extends about 3.5 km (geographic distance) along the road from Gedong to Wuhe. The starting point is about 5 km north of Gedong Town, which is 22 km from the town of Taijiang. Exposure of strata in the Wuhe section is incomplete. Except for the thicknesses of the Toushantuo and Liuchapo formations, which were measured in the Wuhe section, the thicknesses of Cambrian formations referred to herein were obtained from neighboring sections near Dengzhou Village.