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新疆和静巴音布鲁克地区侏罗系中发育一套在潮湿气候条件下形成的冲积角进积至内陆湖泊中而形成的扇三角洲沉积体。三角洲层序完整，清楚显示向湖进积序列：扇三角洲平原部分主要以泥石流成因的块状砂砾岩为主，夹扇面河道沉积的含砾砂岩、中粗粒砂岩透镜体及中落层状漫流沉积；扇三角洲前缘以碎屑流沉积的块状砂砾岩为主，夹水下分流河道沉积的砂岩透镜体；前扇三角洲以深灰色页岩、粉砂质页岩为主，夹浊流成因的砂岩，沉积体中含丰富的植物化石，局部见碳质页岩及薄煤层，前扇三角洲泥岩为好的烃源岩。
In the Jurassic of Xinjiang and Jingbaoyinbuluke, a set of fan-delta sedimentary bodies formed by the deposition of alluvial horns formed in humid climates into inland lakes were developed. The delta sequence is complete and shows clearly that the sequence of sedimentary processes to the lake is as follows: the massive sand-gravel mainly dominated by debris flow in the fan delta plain, the gravelly sandstone deposited in fan-shaped channel, the medium-coarse sandstone lens, Sedimentary; fan delta front debris detritus deposition of massive conglomerate, sandwiched sub-distributary channel sedimentary sandstone lens body; the former fan delta shale with shale, silty shale-based, turbidity flow Genesis of sandstone, sedimentary body rich in plant fossils, see the local carbonaceous shale and thin seam, the former fan delta mudstone is a good source rock.