震旦系灯影组
sinian dengying formation
震旦系－寒武系界线地层对比
the Sinian-Cambrian boundary strata
震旦系-寒系系边界层
Sinian-Cambrian boundary beds
震旦系浅变质岩
Sinian epimetamorphic rocks
震旦系－下古生界
Sinian system-lower Paleozoic
sinian-lower palaeozoic
sinian-lower paleozoic
震旦—寒武系界线事件集群
Event group across the Sinian-Cambrian Boundary