plate tectonics definition

  • noun:
    • A theory that explains the global distribution of geological phenomena such as seismicity, volcanism, continental drift, and hill building in terms of the development, destruction, action, and relationship associated with planet's lithospheric plates.
    • The characteristics of plate action.
    • The large-scale activity of tectonic dishes that contributes to continental drift.
    • A geological principle which keeps your crust associated with earth (the lithosphere) is divided in to a small amount of huge split plates which float and move slowly around regarding more synthetic asthenosphere, breaking aside and leaving both at points where magma upwells from below, and, driven by these types of upwellings also currents on athenosphere, sliding past each other, colliding together, and in some cases being submerged (subducted) one underneath the various other. This concept is currently widely acknowledged, and explains numerous geological phenomena including the clustered areas of earthquakes, hill building, volcanism, and the similarities noticed between your geology of continents, including south usa and Africa which are now far aside, but, according to the concept, were once joined collectively. The movements of these tectonic dishes are very slow, usually only a few centimeters annually, but over tens and billions of years, cause very large alterations in the general positions associated with continents. The result of such activity of plates is called continental drift.
    • a geological theory which considers the planet earth's crust as split into many big fairly rigid dishes, which move fairly by themselves regarding the more plastic asthenosphere intoxicated by magmatic upwellings, in order to move apart, slide last, or collide together, inducing the development, breakup, or merging of continents, and causing volcanism, the building of hill ranges, together with subduction of just one plate beneath another. In recent years a large human anatomy of information have actually built up to support the idea and provide some information on the components in the office. One group of supporting findings comprises of data showing your continents have slowly moved in accordance with each other over-long intervals, a phenomenon called continental drift. Africa and south usa, including, have obviously relocated besides a connected setup at about 2-3 cm each year over tens of an incredible number of years.
    • the part of geology studying the folding and faulting of this planet's crust

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