The fossils are exposed in cryptocrystalline - crystal powder limestone of Wujiaping formation (P...
The Silurian system represents the period when the crustal movements were at its strongest in the...
There are plenty of fossils of various kinds in high density, mostly Coronocephalus rex Grabau in...
Tribolite fossils forming in the upper part of Tongzi formation(O1t) in the lower Ordovician seri...
Most of Agnostida of the section of Paibian Stage were widely distributed around the world, and t...
