通过对内蒙古石拐、苏勒图、冀北和辽西北票等侏罗纪含煤盆地下-中侏罗统的五当沟组、召沟组、北票组等的岩性及其所含植物化石、古气候的对比研究，认为辽西北票组底部的一套粗碎屑岩为主的杂色岩系沉积为内蒙古西部、冀北的五当沟组东延部分，建议将其单独划出为五当沟组；底部杂色岩系之上的含煤地层和召沟组差别较大，建议仍保留北票组名称。通过植物化石和孢粉分析，五当沟组为早侏罗世晚期比较干热气候下的产物，而召沟组和北票组为中侏罗世早期温湿气候下的产物。%Through comparative study on lithology, containing plant fossils, paleoclimate of lower-middle Jurassic Wudanggou, Zhao⁃gou and Beipiao formations in Inner Mongolia (Shiguai, Surat), northern Hebei, western Liaoning (Beipiao) Jurassic coal-bearing ba⁃sins, considered that a set of mainly variegated coarse clastic rock series in western Liaoning Beipiao Formation bottom part are east⁃ward extending of Wudanggou Formation in western Inner Mongolia and northern Hebei, thus advised to nominate this part as Wudang⁃gou Formation. While the lithology of Beipiao Formation is quite different from Zhaogou Formation, so the name Beipiao Formation should be retained, specially refer to the original coal bearing strata above bottom variegated rock series. Based on fossil plants and spo⁃ropollen analysis, Wudanggou Formation is late Early Jurassic Epoch outcome under dry hot climate;while Zhaogou and Beipiao forma⁃tions are early Middle Jurassic Epoch outcome under warm humid climate.
展开▼
