河北蔚县中侏罗统下花园组之新认识  

NEW CONTRIBUTION TO THE KNOWLEDGE OF THE MIDDLE JURASSIC XIAHUAYUAN FORMATION IN YU COUNTY,HEBEI

作　　者：张树胜 

机构地区：[1]河北省煤田地质局第四地质队,河北宣化075100

出　　处：《地层学杂志》2011年第4期404-410,共7页Journal of Stratigraphy

摘　　要：河北省蔚县煤田中侏罗统下花园组上、下段地层在沉积岩性质及含煤性等方面存在着显著差异,为不同大地构造背景及古地理条件下的产物,表示其间经历了构造运动,其界线置于杂色岩层底部为宜,从区域上看二者应为不整合接触关系。名称上没有必要使用下花园组一名,起用京西门头沟煤田的相应地层名称,将原下花园组上段改称为龙门组、原下花园组下段改称为窑坡组。There are significant differences in the characteris of sedimentary rock and coal seams between the upper and lower members of the middle Jurassic Xiahuayuan Formation in Yu County,Hebei province,China.These two members represent sedimentary products in different tectonic and palaeogeographic conditions,indicating tectonic movements between them.There is an unconformable contact between the upper and lower members of this formation and the boundary between them should be placed at the base of the mottled rock bed.

关 键 词：岩石地层 不整合 下花园组 龙门组 窑坡组 侏罗系 蔚县 河北 

分 类 号：P534.52[天文地球—古生物学与地层学]