On the Late Silurian Stratigraphy of the Zhangjiajie Area, Hunan Province, with a Discussion on Age of the Xiaoxi Formation
Based on newly discovered microfossils(including phytodebris microfossils)from the Xiaoxi Formation in the Zhangjiajie-Sangzhi area, northwestern Hunan Province, the occurrence of Ludlow-Pridoli strata in the interior of the Yangtze Platform is verified. It consists of yellow-green clastic sediments with plenty of trace fossils. The Huixingshao Formation is commonly referred to as the upper red beds with an age of Late Telychian, Llandovery. The latest Telychian, Wenlock and early