The Xingtai mining area is a typical North China Permo-Carboniferous karstic type coalfield, its lower coal group is generally under threat from the thick Ordovician limestone strong karstic aquifer.
邢台矿区属典型的华北岩溶型石炭—二叠系煤田，下组煤普遍受巨厚奥陶系灰岩强岩溶含水层的威胁。
Biologic limestone, black mudstone and coal in Taiyuan group of lower Permian in east part of Ordos basin.
鄂尔多斯盆地东部地区太原组广泛发育的气源岩为生物灰岩、暗色泥岩和煤。
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