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依据对重庆秀山地区微体化石(主要指植物碎片和疑源类)和大型虫管遗迹化石研究,对迴星哨组进行了厘定,将它一分为二,上部为志留纪晚期的小溪组,下部为厘定后的迴星哨组。厘定后的迴星哨组以紫红色粉砂质泥岩为主,与下伏秀山组呈整合接触,与上覆小溪组呈假整合接触,地质时代为Llandovery世Telychian晚期。基于对贵州印江、重庆秀山和湖南龙山—张家界地区志留纪晚期地层的研究,指出:在“扬子上升”后,在华南块体的中心地带——湖南张家界地区至贵州印江地区发育有志留纪晚期沉积,进一步论证了华南块体在志留纪晚期曾一度遭受过海侵,并在一定区域内沉积了具有一定厚度的地层。
Based on the study of microfossils (mainly plant fragments and suspected sources) and large-scale insect-tube fossils in the Xiushan area of Chongqing, the Starburst Formation was determined and divided into two parts. The upper part was a small Silurian Creek group, the lower part of the determination of the return star whistle group. After the determination, the Hui-hun group mainly consists of mauve silty mudstone, which is in conformity with the underlying Xiushan Formation and is in contact with the overlying Xiaoxi Formation. The geological epoch is Llandovery Late Telychian. Based on the studies on the Late Silurian strata in Yinjiang of Chongqing, Xiushan of Chongqing and Longshan-Zhangjiajie of Hunan Province, it is pointed out that after the “Yangtze uplifted”, in the center of South China block- Zhangjiajie area in Hunan Province to Yinjiang area in Guizhou province In the late Silurian, the southern South China block was once subjected to transgression in the late Silurian, and a certain thickness of strata was deposited in a certain area.