lower carboniferous series

基本解释

The lower part of the Upper Carboniferous Series is called Sixiakou Formation whose definition differ.
上石炭统下部称泗峡口组，重新定义了泗峡口组的含义。
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.
区内石炭—二叠纪煤系具有良好的煤型气及一定的煤层气潜力，中、下侏罗统和下白垩统暗色泥岩类是最具生油潜力的烃源岩系。
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.
湘中涟源煤盆地早石炭世测水组、晚二叠世龙潭组煤系是中国东南诸省境内最重要的煤系，具有较大的生气、储气能力。