In order to fully understand the term tectonic plates, it is necessary, first, to determine the etymological origin of the two words that shape it:
- Plate emanates from the French "plaque", which is used to refer to something flat and thin that is placed on a thing.
-Tectonics, meanwhile, derives from the Greek "tektonikos." A word is made up of two clearly differentiated elements: "tecton", which is synonymous with "worker", and the suffix "-ikos", which is used to indicate "relative to".
A license plate it can be some kind of table or griddle that develops certain functions or that is used to display information. Tectonic , meanwhile, is a adjective that, in the field of geology , is used to qualify what is linked to the structure of the Earth's crust.
The concept of tectonic plates refers to the lithosphere segments that move over the upper mantle of planet . It should be noted that the lithosphere is the earth's surface layer whose most important characteristic is stiffness.
The lithosphere, therefore, is composed of various tectonic plates that move and interact. In the shock regions of the tectonic plates the telluric, volcanic and seismic activity , promoting the development of elevations.
It is also important to know that precisely those plates and the movements they perform give rise to the creation of various types of limits:
-Divergent limits, which is where the plates separate from each other. They can be found in enclaves such as the Great Rift Valley.
-Convergent limits, which, in turn, are the areas in which the aforementioned plates join each other. Examples are found in the Mariana Trench in the North Pacific Ocean.
-Transforming limits, which are those spaces where the plates, in relation to each other, move sideways. In this case, the best example is the San Andreas Fault, known for the fact that those limits mentioned resulted in the famous earthquake that affected the city of San Francisco in 1906.
Among the fifteen largest tectonic plates in the world are the African, Eurasian, coconut, Arabic or Antarctic.
The theory linked to origin and the characteristics of tectonic plates consolidated from the decade of 1960 . Scientific evidence holds that currently our planet is the only one of the Solar system which has active tectonic plates, but it is believed that, in ancient times, Venus and Mars They also had plates of this type.
The most important tectonic plates of the land are the Eurasian plate , the North American plate , the South American plate , the african plate , the peaceful plate , the Indo-Australian plate and the antarctic plate . Also exist secondary plates , microplates and other kinds of plates.
The plates can be qualified according to the type of bark they present. You can distinguish between the continental crust (which has an average thickness of thirty-five kilometers) and the oceanic crust (whose thickness does not exceed ten kilometers).