二叠纪-三叠纪
permian-triassic
Changxing Feixianguan formations
二叠纪-三叠纪界线
permian-triassic boundary
二叠纪-三叠纪界线地层
Permian-Triassic boundary section
permian-triassic boundary
二叠纪—三叠纪牙形石
Permian-Triassic conodont
二叠纪-三叠纪之交
Permian-Triassic interval
二叠/三叠纪界线
permian-triassic boundary
二叠-三叠纪
Permian to Triassic Period
permian-triassic
震旦纪
sinian period
volcanic rocks
Vendian
Sinian
tu-rbidity current deposition
single-unit panel