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湖南南部郴县、桂阳交界的华圹地区,晚二叠世晚期地层发育良好。在东西长6公里,南北宽1.3公里的华塘向斜范围内(图1),岩相变化很大,既有以硅质岩为主含菊石的“大隆组”,又有以厚层白云质灰岩为主,含筵类、菊石、腕足类等的“长兴组”。笔者在采集化石、测制剖面进行生物地层工作的同时,对上述两种岩相的变化关系进行了追索和研究,现将我们的认识概述如下。 (一)郴县华塘公社三合小学剖面
In the area of Huaying, at the junction of Chen County and Guiyang in the south of Hunan Province, the Late Late Permian strata developed well. Within 6 km from east to west and 1.3 km from north to south wide Huatang syncline (Figure 1), lithofacies vary greatly, both silicalite-based ammoniated “Dalong Formation”, and thick Layer dolomitic limestone, containing feast, amethyst, brachiopods and other “Changxing group.” While collecting fossils and measuring sections for biological stratigraphy, the author has made recourse and research on the relationship between the above two lithofacies. Now, our understanding is summarized as follows. (A) Chen Tong Huatang commune elementary school section