摘要
长顺县漫滩附近中泥盆世东岗岭期生物礁。是台缘点礁,主要造礁生物是层孔虫。可划分三个成礁旋回。
The Mantan bioreefs, located in Changshun County, Guizhou Province, occurred in the strata of Donggangling stage of Middle Devonian.
The Mantan bioreefs were gradually formed on the basis of clastic rock beaches. From below to top, they were gradually changed from beach to reef and finally to carbonate beach, with stromatoporoides being the main reef-building organisms.
According to lithological and sedimentary features and organic assemblages, the reefs can be divided into three reeg-building cycles.
The first cycle was from beach facies to reef facies, and then to beach fa-cies. The second cycle was from reef facies to organogenic mounds, and then to logunas. And the last cycle was from beach facies to reef facies, and then to carbonate beach facies. The regular changes of the environment were the direct causes of rhythmic textures of the reefs.
出处
《贵州地质》
1989年第1期65-70,共6页
Guizhou Geology
