石炭－二叠纪
Carboniferous to Permian
Carboniferous and Permian
carboniferous-permian
石炭—二叠纪
Permo-carboniferous period
carboniferous-permian
permo_carboniferous
permo-carboniferous
Yuanshi mining area
石炭－二叠纪裂谷
Carboniferous-Permian rift
石炭-二叠纪煤系
Carboniferous and Permian coal bed
天山及邻区石炭纪－早二叠世裂谷火山岩
Carboniferous-Early Permian rift-related volcanic
晚石炭世－二叠纪
late carboniferous-permian
泥盆纪-石炭纪
Devonian-Carboniferous period
devonian-carboniferous
石炭二叠系
Carboniferous and Permian
permo Carboniferous
Permo-carboniferous system
permo-carboniferous
石炭－二叠系
carboniferous period—permian period
Pero-carboniferous system
Permo-carboniferous system
Carboniferous-Permian coal sequence
the Permo-Carboniferous
permo-carbonniferous
carboniferous-permiansystems
Carboniferous-Permian deposits
carboniferous-permian
permo-carboniferous
石炭—二叠系
Carboniferous and Permian
Permo-carboniferous system
Carboniferous-Permian coal sequence
Carboniferous-Permian formation
conodont biostratigraphy
carboniferous-permian
permo-carboniferous
石炭－二叠系界线
Carboniferous-Permian boundary
石炭—二叠系煤系
Permo-Carboniferous coal measure
二叠纪—三叠纪牙形石
Permian-Triassic conodont