Monday 30 of April

Hello, today is our last day here so we want to take advantage to it¡... we went early to the caverns, because we want see more than yesterday. 
I took lots of pictures of the differents caverns. The guide explained all god and easy to understand. 
All the caverns are of limestone- a sedimentary rock compose of calcium carbonate(CaCO₃)- and the water has change the rocks. The limestone in contact with water is transformed into calcium bicarbonate.   
The water in contact with limestone formed a tipe of landscape: the karst. 
The process that produce that is weathering, more specifically, chemical wheathering. 

Peter with a stalagmite

In the caverns there are many stalactites and stalagmites. The stalactites are formed in the roof of the cave by filtration in the cave of mineralized water being deposited (a process of dissolution). The stalagmites are formed in the soil by the deposition of the mineralized water in the ground( a precess of precipitation). Also there are columns, that are the union of a stalagmite and a stalactite. 
The caverns are formed by a process of dissolution, and are big spaces in the rocks. In this National Park, there are some that are big and others that are smaller. 
The roads inside the caves are wide and comfortable. It has posters explained the things good.
In these caves there are enormous deposits of gypsum. The limestone was impregnated with petroleum, whose descomposition by bacteria produces hydrogen sulfide, which reacts with oxygen and water to produce sulfuric acid. This acid dissolves the limestone like sugar, and the result is the frmation of calcium sultate (gypsum).