晚石炭世－早二叠世早期
Late Carboniferous-early Early Permian
晚石炭世—早二叠世早期
Late Carboniferous-early Early Permian
早二叠世早期栖霞组底部
Bottom of Chihsia Formation
天山及邻区石炭纪－早二叠世裂谷火山岩
Carboniferous-Early Permian rift-related volcanic
中二叠世
middle permian maokou formation
middie-permian
maokou stage
middle Permian
晚二叠世晚期
The later period of upper permian
晚石炭世—早二叠世
Late Carboniferous to Early Permian
晚二叠—早三叠世
late Permian-early Triassic
晚二叠世—早三叠世
late Permian-early Triassic