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鄂西利川见天坝晚二叠世生物礁位于利川复向斜构造带镶边型台地陡斜边缘,濒临鄂西海槽,属于台地边缘礁,该礁体大型柱状海绵丰富,构成生物礁生物骨架,并在不同水体深度发育不同礁石类型。将见天坝长兴组地层划分为P-Sq1和P-Sq22个三级层序,礁体主要在P-Sq1高位体系域发育。P-Sq1高位体系域可划分为4个岩性段,对应可划分出个4准层序组。
The Late Permian reef in Sichuan Province, Sichuan, is located on the steeply sloping edge of the Icheon synclinic stripe-type platform and borders the western Hubei basin. It belongs to the marginal reef of the platform and is rich in large columnar sponges that form the reef biological skeleton , And develop different reef types in different water depths. The Changxing Formation in Jiantianba is divided into 22 third-order sequences of P-Sq1 and P-Sq. The reef mainly develops in the P-Sq1 high-level system tract. The P-Sq1 highstand system tract can be divided into four lithology segments, corresponding to four quasi-sequence groups.