二叠／三叠系界线层
Permian-Triassic boundary beds
二叠系－三叠系界线
permian-triassic boundary
二叠系—三叠系界线
Permo—Triassic boundary
permian-triassic boundary
陆相二叠系－三叠系界线
Terrestrial Permian-Triassic boundary TPTB
陆相二叠系—三叠系界线
circular plate type elastomeric pad bearings
二叠／三叠纪界线
permian-triassic boundary
三叠系-侏罗系界线
Triassic-Jurassic boundary
三叠系延长组
Yanchang Formation of Triassic
yanchang formation
triassic yanchang formation
三叠系须家河组四段
Luojiang structure in West Sichuan
三叠系须家河组
triassic xujiahe formation