北京西山下苇甸地区青白口系长龙山组沉积相及层序地层研究*
张驰, 李建安, 焦杰伟, 丁玥, 邵龙义

A study of sedimentary facies and sequence stratigraphy of the Changlongshan Formation(Qingbaikouan)in Xiaweidian area, West Mountain of Beijing
Zhang Chi, Li Jian’an, Jiao Jiewei, Ding Yue, Shao Longyi
北京西山下苇甸地区青白口系长龙山组岩石类型 a—含砾石英砂岩,呈正粒序,与下伏岩层突变接触,块状构造,碎屑结构;b—粉砂岩,呈正粒序,与下伏岩层渐变接触,层状构造,泥质结构;c—泥岩,与下伏岩层渐变接触,层状构造,泥质结构;d—辉绿岩,侵入接触,块状构造,辉绿结构