There are six depositional systems classfied for the depression: alluvial fan, underwater fan, fan delta, fluvial, shore-shallow lake sand bar and deep-lake depositional system.

• 查干凹陷发育六大沉积体系:冲积扇体系、河流体系、水下扇体系、扇三角洲体系、滨浅湖砂坝体系、深湖体系。