大象传媒

The scenery of underground cave systems is developed by the slow deposition of calcite on the ceiling, walls and floors of the caves. Water flows underground through joints in the limestone and along bedding plates forming underground caves, caverns and streams. Re-deposition of calcium carbonate as calcite crystal forms stalactites hanging from the ceiling, stalagmites on the floor and pillars where these two features fuse. Flowstone forms on the walls of caves. It takes thousands of years for these features of underground scenery to form.