Definitions, concepts and meanings of geographical depression

Definition of geographical depression

The geography of our planet presents different landforms that make and determine the particularities of each land, while a geographical depression is an area, an area of the relief of our planet that is characterized for being in one lower altitude with respect to the regions surrounding it.
What causes a depression is basically the sinking of the land in question and it may be due to several causes. Subsidence is a common reason for depressions which consists of the vertical collapse of the ground corresponding to a sedimentary basin at the rate of a process of digging and the consequent weight bearing sediments. The soil is totally destabilized and then there is depression of the ground vertically at a rather slow pace.
Distinct is what happens with the collapses of the land in which the rapidity of the sinking is indeed phenomenal and soon is the totally depressed area.
After that collapse the area affected by the depression can be literally covered by water, several meters from the surface of water, i.e., under the sea level, or failing cannot be completely to sail from adjacent areas that boast a superior altitude. Some examples of well characteristic of what we discussed are the Caspian Sea, which is the maximum depression of the European continent and on the other hand the great basin in the western part of the United States of America.
The size of depressions can be a few meters in diameter or being a huge depressive structure that even up to a continental level can hold.
Depression can be the result of several factors, among them: the movements that occur in the tectonic plates and which have a direct impact on the geological material; When will accommodate such a relief of mountains; the oscillations that occur in the soil or groundwater, either by natural causes or by the intervention of man; a fault in the geological structure, among others.