Stalactites and stalagmites
Stalactites and stalagmites are both made of limestone. The lime in the cave dissolves in the water, and the lime in the water gathers little by little, gradually forming an ice cone-shaped object on the roof of the cave. This is called stalactite, also called stalactite (similar to the icicles under the eaves in winter in the north). Water dripped from the roof of the cave and fell to the ground, and the lime gradually accumulated, accumulating higher and higher, forming an upright bamboo-like column called a stalagmite. Stalagmites often face stalactites up and down. Over time, some stalactites and stalagmites are connected to form stone pillars. Both stalactites and stalagmites come in a variety of shapes. Those towering "Ganoderma Pillars" are formed by the joining of stalagmites and stalactites. It is said that stalagmites and stalactites only grow one centimeter (one centimeter, ten millimeters) in height every hundred years