It is a cavity of natural origin that is formed in any region by the action of the erosion of water, lava or ice, the most common being due to the action of water in a state a little above normal acidity levels which erodes at the stone limestone and leads to the formation of the caves and are also called sometimes such formations can serve as holes or burrows for some animals, typically are sites where abundant moisture its size can vary be very variable, since there are caverns where only one person would fit while there are others that are thousands of kilometers long.
The direct erosion in the rock by the action of elements such as water, snow and lava from volcanoes, is the main cause by which these structures are formed, according to experts, the caves served as a refuge for primitive humans, who inhabited the earth in prehistoric times, proof of this are the different inscriptions that have been found in different caves around the world.
The caves can be classified according to the time in which they were formed with respect to the rock formation that integrates it, thus emerging three types of caverns.
The primary caverns, also known as volcanic caves, so named because the experts assure that these structures were created at the same time that the rocks on the earth's surface began to solidify, currently due to the constant volcanic activities they can be Observing new formations of this type, this occurs because when a volcano erupts the lava moves downward, which causes the lava on the surface to solidify while lava continues to flow below it, after finally the eruption ends, the lava leaves between the solidified crust and the surface of the floor a cavity left by the lava that descended.
Por su parte las secundarias son aquellas que se originan por acción de diferentes procesos químicos sobre la roca ya formada, algunos de dichos procesos son la erosión, la karstificación y la pseudo karstificación. Por otro lado los movimientos de las placas tectónicas también pueden dar paso a la formación de este tipo de cuevas.
