湖泊是大陆上地形相对低洼和流水汇集的地区。根据洪水面、枯水面和浪基面，把湖泊相划分为滨湖亚相、浅湖亚相、半深湖亚相和深湖亚相，平面上它们大致呈环带状分布，另外，还可划分出湖湾亚相。
沉积区由西向东依次发育河流相、三角洲相、湖泊相。
River, delta and lacustrine facies are developed in deposited area from west to east.
流沙港组主要发育辫状河三角洲相和湖泊相两种沉积体系。
Braided delta and lacustrine facies are two major depositional systems developed in Liushagang Fm.
沉积相可分冲积扇相、扇三角洲相、湖泊相、河流相和沼泽相。
The sedimentary facies can be classified into alluvial fan, fan delta, lake, stream and swamp.
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