下部以灰绿色、灰色粉砂质钙质板状页岩为主,夹灰色灰岩、泥质条带灰岩;中部以灰色鲕状灰岩为主夹泥质条带灰岩和泥质灰岩;上部以浅绿色页岩粉砂岩为主。含三叶虫:Chuangia,Changia,Prochuangia,Parachangshania,Kaolishania,Shirakiella,Lioparia,Dikelocephalites,Sanduspis,Hedinaspis,Proceratopyge,Pseudagnostus,Homagnostus,Geragnostus 等,由下而上可建3个三叶虫带:① Chuangia 带;② Parachangshania 带;③ Kaoli...