广西南丹拉要泥盆纪生物礁发育在台地的边缘，是一个礁、滩、开阔台地沉积互相交替的叠置礁。礁组合中出现5个主要的生物群落。其中以层孔虫、床板珊瑚为主的 Stromatopora-Alveolites群落是最重要的造礁群落。这些群落有规律地分布在礁组合的不同部位。它们在剖面上的垂直分布显示礁组合的发育过程分成3个大的旋回，其中包括9个次一级的成礁旋回。旋回反映了海水深浅的变化。

The Devonian reef complex at Layao of Guangxi was developed on the edge of Weining-Dushan carbonate platform. It was composed of superimposed reefs and deposits of banks and platforms. Five main communities occurred in the reef complex and represented respectively five different kinds of depositional environments. Among these, the Stromatopora-Alveolites community, dominated by stromatoporoids, was very important for reef-building. Five communities occupied regularly the different positions in the reef complex. The vertical distribution of the communities in the section indicates that the process of reef developing can be divided into three cycles, which include nine secondary cycles. The cycles reflect the variations of the sea water depth.

Q911.5

国家自然科学基金资助项目 (No .40 3 72 0 62 )研究成果