Meanwhile, the Beipiao formation is composed of fluvial system and lacustrine system and the Jiufotang formation is made up of fluvial system, braided river deltaic system and lacustrine system.

• 同时,北票组发育河流沉积体系和湖泊沉积体系;九佛堂组发育河流沉积体系、辫状河三角洲沉积体系和湖泊沉积体系。