lower carboniferous series

基本解释

The lower part of the Upper Carboniferous Series is called Sixiakou Formation whose definition differ.
上石炭統下部稱泗峽口組，重新定義了泗峽口組的含義。
Permo Carboniferous coal series have relative good coal gas potential, dark mudstones in Lower Jurassic, lower part of Middle Jurassic and Lower Cretaceous are the best source rocks.
區內石炭—二曡紀煤系具有良好的煤型氣及一定的煤層氣潛力，中、下侏羅統和下白堊統暗色泥巖類是最具生油潛力的烴源巖系。
The Lower Carboniferous Ceshui and Upper Permian Longtan coal series are most important in Southeast China, and can both generate and bear gas greatly in the Lianyuan coal basin, Central Hunan, China.
湘中漣源煤盆地早石炭世測水組、晚二曡世龍潭組煤系是中國東南諸省境內最重要的煤系，具有較大的生氣、儲氣能力。