冀北内蒙古隆起带及其南缘侏罗纪煤系地层探讨

通过对冀北内蒙卉隆起带及其南缘侏罗纪煤系岩性特征及所含植物化石进行研究，并将其与内蒙古早-中侏罗世含煤地层进行对比，认为研究区早一中侏罗世下花园组下部以碎屑岩为主夹煤线的杂色岩性段，以植物化石Coniopteris种数和数量的稀少为特征，应单独划分为一个组，与内蒙古五当沟组相当，应称之为五当沟组。上部灰、深灰色夹灰绿色以砂岩、粉砂岩、泥岩为主含可采煤层的细碎屑岩性段，以含有丰富的植物化石Coniopteris为特征，是内蒙古召沟组在冀北的延伸，应称之为召沟组。

Probe into Northern Hebei-Inner Mongolia Uplifted Zone and Its South Margin Jurassic Coal Measures Strata

Based on northern Hebei-Inner Mongolia uplifted zone and its south margin Jurassic coal measures strata lithologic characteristics and plant fossil studies correlated with Inner Mongolian Early-Middle Jurassic coal-bearing strata, considered that the lower part of Early-Middle Jurassic Xiahuayuan Formation variegated rock member, mainly clastic rocks intercalated with coal streaks, characterized by plant fossil Coniopteris in small numbers and few species should be divided as a separate formation corresponding to the Wudanggou Formation in Inner Mongolia and should be called as Wudanggou Formation. Upper part gray, dark gray intercalated with grayish green mainly sandstone, siltstone and mudstone fine clastic rock member containing mineable coal seams and characterized by abundant Coniopteris fossils is extending of the Inner Mongolian Zhaogou Formation in northern Hebei and should be called as Zhaogou Formation.