The middle Jurassic series Yanan Formation of in Lingwu coalfield is a lacustrine deltaic deposit.
灵武煤田的中侏罗统延安组含煤岩系为一湖泊三角洲沉积。
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。
Uranium mineralizations are hosted in the Middle-Lower Jurassic coal-bearing series.
下侏罗统含煤系是铀矿化赋存的有利部位。
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