The Ediacaran-Cambrian succession in South China records dramatic biological,oceanic and geochemical changes,but it is n......

上震旦统灯影组2段和3段是四川盆地主要天然气储层之一。在浅色白云岩地质层中富含炭化的黑色非叠层石生态系兰细菌白云岩。它既可......