underplating
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Underplating — is the result of partial melts being produced in the mantle wedge above a subducting plate. The partial melting is induced by a lowering of the solidus by the input of water and other volatiles supplied by phase changes in the subducting slab.… … Wikipedia
Magmatic underplating — Description Magmatic underplating occurs when basaltic magmas are trapped at the Mohorovičić discontinuity, within the crust, or even in crust mantle transition zones. Large amounts of magma reach the surface via volcanoes, but there are times… … Wikipedia
Oceanic trench — Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. The oceanic trenches are hemispheric scale long but narrow topographic depressions of the sea floor. They are also the… … Wikipedia
Titan (moon) — Titan Titan in 2005 by Cassini spacecraft Discovery Discovered by Christiaan Huygens … Wikipedia
Basement rock — usually refers to the thick foundation of ancient, and oldest metamorphic and igneous rock that forms the crust of continents, often in the form of granite. Basement rock is contrasted to overlying sedimentary rocks which are laid down on top of… … Wikipedia
Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… … Wikipedia
Monzogranite — Monzogranites (MGr) are biotite granite rocks that are considered to be the final fractionation product of magma. Monzogranites are characteristically felsic (SiO2 > 73%, and FeO + MgO + TiO2 < 2.4), weakly peraluminous (Al2O3/ (CaO + Na2O… … Wikipedia
Stillwater igneous complex — The Stillwater igneous complex is a large ultramafic to mafic layered intrusion located in southern Montana in Stillwater, Sweet Grass and Park Counties. The complex is exposed across 30 miles (48 km) of the north flank of the Beartooth Mountain… … Wikipedia
Narooma Terrane — The Narooma Accretionary Complex or Narooma Terrane is a geological structural region on the south coast of New South Wales, Australia that is the remains of a subduction zone or an oceanic terrane. It can be found on the surface around Narooma,… … Wikipedia
Wyoming craton — [ North American craton, also called Laurentia.] The Wyoming craton is located in the west central United States more specifically, in Montana, Wyoming, and parts of northern Utah. Also called the Wyoming province, it is the initial core of the… … Wikipedia
