摘要
根据１∶５万区域地质调查资料，将四川省雅安—宝兴地区的侏罗—白垩系地层，由老至新划分为白田坝组、千佛崖组、沙溪庙组、遂宁组、莲花口组、天马山组、夹关组、灌口组等８个岩石地层单元。描述了层型剖面的层序及岩石组合特征，讨论了生物地层及年代地层问题。对侏罗—白垩系的沉积环境进行了分析，初步划分出河流相、湖泊相、冲积扇相三大类型。
On the basis of the data of 1∶50 000 regional geological surveys, the Jurassic Cretaceous strata in the Ya'an Baoxing area, Sichuan province, are divided in ascending order into the Baitianba, Qianfoya, Shaximiao, Suining, Lianhuakou, Tianmashan, Jiaguan and Guankou Formations. This paper describes the sequences of strata and rock associations of the stratatype section and discusses the biostratigraphic and chronostratigraphic problems. The author has analyzed the Jurassic Cretaceous depositional environments and preliminarily recognized the fluvial, lacustrine and alluvial fan facies.
出处
《中国区域地质》
CSCD
1998年第2期124-131,共8页
Regional Geology of China
基金
地质矿产部区域地质调查项目
关键词
侏罗-白垩系
岩石组合
生物地层
地层年代
Jurassic Cretaceous, rock association, biostratigraphy, chronostratigraphy, depositional environment, Ya'an Baoxing area
