Pit-in-pit

cut-off lake (oxbow lake)

oxbow lake (cut-off lake)

Salified lake saline lake

shore-lake and shallow-lake sub-facies

The regions of Poyang Lake and Dongting Lake

The Upper Lake of Shengjin Lake

a group of tomb pit

abandoned open pit

abandoned pit

Accessory Pit

active mud pit

active pit

adjacent foundation pit

Affluent from Pit shaft

air pit

air pit defect

air valve pit

algal pit