The terrestrial relief, as seen in the image, are the different forms that the earth's crust or lithosphere has on its surface. They are formed both in the emergent lands, as in the underwater relief or seabed. Its origin is due to the balance between the internal forces of the Earth, such as volcanism, and external forces, such as rain or wind.
From the processes that take place between the two forces, four forms of relief arise: mountains, plains, plateaus and depressions.
The mountains, also known as mountains, are elevations that form in the crust. Its height exceeds 500 meters. Its origin is tectonic, by folding, although they can also be of volcanic origin. When several aligned mountains arise they form mountain ranges or mountain ranges.
The plains are also known as plains, and are flat or practically flat extensions of land, with very little inclination. They are less than 500 meters high above sea level.
The plateaus or plateaus are also extensions of little sloping terrain, but their height is more than 500 meters. They are also known as highlands or mezzanines.
As for depressions, they are reliefs whose level is relatively lower than sea level. They are divided into absolute, with an altitude below sea level, or relative, when their relief is of lower relative altitude than those around them.
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