The shallow lake subfacies with affluent near-shore beach and bar and sandsheet is mostly developed because the water depth is shallow.

• 此外，浅湖近岸滩坝滑塌也可形成盆底扇复合体该时期湖泊较浅，主要发育浅湖亚相，近岸滩坝及席状砂较丰富。