Based on the study of sporopollen fossils from the coal-bearing formation of the late Palaeozoic Era in Tangyang mine field of Jining, 71 genera and 177 species of sporopollen are identified.
通过对济宁唐阳井煤田晚古生代含煤岩系中的孢粉化石的研究，共鉴定出孢粉化石71属177种。
The target strata in Yulin gas field lie in the bottom of Shanxi Formation of Permian, Upper Palaeozoic.
榆林气田目的层系位于上古生界二叠系山西组底部。
The hydrocarbons of the Yancheng depression mainly came from Palaeozoic Marine sapropelic materials, partly from the Taizhou or Pukou formation.
盐城凹陷油气主要来源于古生界海相腐泥型源岩，并有少许上白垩统泰州组或浦口组的贡献。
A volcanic event layer in the Middle Taiyuan Formation of Late Palaeozoic is widely distributed in the central Shanxi and western Hebei.
在岩矿鉴定的基础上，对晋中冀西太原组中段普遍发育的一层火山事件层做了岩石化学、稀土元素和微量元素分析。
A volcanic event layer in the Middle Taiyuan Formation of Late Palaeozoic is widely distributed in the central Shanxi and western Hebei.
在岩矿鉴定的基础上，对晋中冀西太原组中段普遍发育的一层火山事件层做了岩石化学、稀土元素和微量元素分析。
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