A perfact Carboniferous reef complex developed on top of a volcanic seamount on the oceanic floor in the Akiyoshi Terrane, Southwest Japan. 一个完好的石炭纪生物礁发育在日本秋吉地区的玄武岩熔岩和火山碎屑岩之上。
The North Amu Darya Sub-Basin where the reef reservoirs and paleo-high structures were well developed, contains bulk of the sub-salt proved oil and gas reserves. 生物礁和古构造主要发育于盆地东北部的北阿姆河亚盆地，并导致盆地内已发现的盐下油气储量主要分布于此。
