【摘要】 四川汶川县水磨镇及都江堰市青城后山五龙沟、泰安寺一带的侏罗系,为一套厚度巨大的砾、砂岩沉积,并组成NE—SW 向的向斜构造。在1997年～1999 年1∶5×104《三江幅》区调期间,测制了该区多条侏罗纪地层剖面,并命名为一个非正式岩石地层单元-五龙沟砾岩,划分为一组、二组、三组。本文概述了它的岩石组合面貌、地层划分对比、年代地层归属,并讨论了五龙沟砾岩冲积扇相特征。更多还原

【Abstract】 The Jurassic in Shuimozheng, Wulonggou and Taianchang of Qingchengshan is composed of conglomerate and sandstone with great thickness and forms a NE SW trending syncline. Several Jurassic sections in the region have been measured during the 1∶5×10 4 regional geological survey since 1997. An informal lithostratigraphic unit named Wulonggou conglomerate was proposed and 3 formations were classified. The lithological association, correlation of stratigraphic division and chronostratigraphy of the Wulonggou conglomerate are described and the characteristics of alluvial fan facies of the Wulonggou conglomerate is discussed.更多还原