湖南泥盆纪棋子桥期的生物层状礁分布很广 ,类型也很复杂。根据它们不同的古生态特征 ,可分为 6种类型。不同类型分布在不同的古地理位置上 ,分别形成不同的沉积环境。某些类型的层状礁与其后形成的边缘礁关系密切 ,对寻找边缘礁具有重要的指示意义 The biological stratigraphic reefs in the Paleozoic period of Hunan Devonian are widely distributed and the types are complex. According to their different paleoecological features, they can be divided into six types. Different types of distribution in different paleogeographical locations, respectively, to form a different sedimentary environment. Some types of stratiform reefs are closely related to the subsequent formation of marginal reefs and are of great importance to the search for marginal reefs