The karst morphological evolution in South China may be summed up as follows: In the regions where the underground water moves in vertical direction , as in Yunan Plateau , the karst morphology appears mainly to be the sunk morphology.When the region is dominated by the horizontal movement of the underground water , the karst morphology appears to be the rivers and plains, while the limestone plateau is dissected into rock mountains. The foot caves always appear at the foot of the rock mountains. ...