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Plate tectonics (from Latin tectonicus, from Ancient Greek τεκτονικός (tektonikós) 'pertaining to building') is the scientific theory that Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago.
This is a list of tectonic plates on Earth's surface. Tectonic plates are pieces of Earth's crust and uppermost mantle , together referred to as the lithosphere . The plates are around 100 km (62 mi) thick and consist of two principal types of material: oceanic crust (also called sima from silicon and magnesium ) and continental crust ( sial ...
The plate tectonics rock cycle is an evolutionary process. Magma generation, both in the spreading ridge environment and within the wedge above a subduction zone, favors the eruption of the more silicic and volatile rich fraction of the crustal or upper mantle material. [ 9 ]
The western edge of the African plate is a divergent boundary with the North American plate to the north and the South American plate to the south which forms the central and southern part of the Mid-Atlantic Ridge.
Dewey was educated at Bancroft's School and Queen Mary and Imperial College at the University of London where he was awarded a BSc and PhD in geology. Following a period as lecturer at the University of Manchester (1960–64), the University of Cambridge (1964–1970) and Memorial University of Newfoundland (1971), Dewey was appointed Professor of Geology at the State University of New York at ...
The Pacific plate and other principal plates of Earth's lithosphere. The Pacific plate is an oceanic tectonic plate that lies beneath the Pacific Ocean.At 103 million km 2 (40 million sq mi), it is the largest tectonic plate.
English: The key principle of plate tectonics is that the lithosphere exists as separate and distinct tectonic plates, which float on the fluid-like (visco-elastic solid) asthenosphere. The relative fluidity of the asthenosphere allows the tectonic plates to undergo motion in different directions. This map shows 15 of the largest plates.
Pages in category "Tectonic plates" The following 91 pages are in this category, out of 91 total. This list may not reflect recent changes. * List of tectonic plates; A.
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