石炭二叠纪 meaning in Chinese

permo-carboniferous period

Analysis on lithofacies and paleogeography coal accumulation for coal measures of the carboniferous - permian period in the east of shan - mian coalfield , henan
豫西陕渑煤田东部石炭二叠纪含煤岩系岩相古地理分析
This formation is dominated by a set of sandstone - mudstone dark clastic rock series which belongs to marginal marine deposit at the end of the gondwana carboniferous - permian glacier period
该组主要为一套砂岩泥岩的暗色碎屑岩系，属冈瓦纳石炭二叠纪冰川末期的边缘海沉积。