The water supply that produces this cave is called allogenic , which means from without . When there is no adjacent insoluble rock, water falls over the whole surface of the limestone and travels through many small passages many tiny inputs. The water is then gathered together underground. These caves are said to be autogenic from within. A cave produced in this fashion tends to be very dendritic, with a complex passage plan.
Allogenic caves tend to flood easily, and accumulate more organic material from outside.
At this point, water movement is dictated mostly by hydrologic pressure, not gravity. Water will move first and fastest through the largest openings, in any direction. However, even if it is fully saturated and the ground water is fully saturated, mixing them produces a slighty under-saturated solution. Small cavities above the water table develop uniformly high concentrations of CO2 because of excess concentrations of the gas in water near the water table. Therefore, it continuously diffuses the gas down into the upper layer of the water table, giving it limitless dissolution properties.