It is called weathering the disintegration and decomposition of a rock on the surface of the earth, or failing that, close to it, as a result of exposure to atmospheric agents and with the participation of biological agents .
By significantly reducing the consistency of the stone masses, weathering is the prelude to erosion .
There are various types of weathering ... In physical weathering , what is produced is breakage or disintegration in the rock, that is, the piece is disintegrating into smaller parts each time, facilitating the erosion process and its subsequent transport . It is caused by environmental conditions such as heat, salt and water .
On the other hand, chemical weathering produces a transformation in the rock, causing loss of cohesion and alteration. The processes involved are the so-called atmospheric ones such as oxygen, water vapor and carbon dioxide.
And finally the biological weathering , also known as external weathering, which consists of the transformation that some living things cause in the rocks. For example, the roots of plants are introduced between the cracks and act as wedges. Almost at the same time, they will leave their tracks on the rocks through the substances they secrete. For example, the nests that cause termites in the soil of the Gran Sabana , cause a significant alteration in the minerals in the soil and subsoil , while this alteration favors the growth of some plants.