The upper mantle of Earth is a very thick layer of rock inside the planet, which begins just beneath the crust (at about 10 km (6.2 mi) under the oceans... 24 KB (2,930 words) - 20:40, 20 February 2024 |
rides atop the asthenosphere, and the two form the components of the upper mantle. The lithosphere is divided into tectonic plates that are continuously... 19 KB (2,307 words) - 18:06, 27 April 2024 |
upper mantle body is a geological region where upper mantle rocks (peridotite) outcrop on the surface of the Earth (including the ocean floor). Upper... 4 KB (475 words) - 06:05, 24 February 2024 |
Lithosphere (category Earth's mantle) lithospheric mantle, the topmost portion of the upper mantle that behaves elastically on time scales of up to thousands of years or more. The crust and upper mantle... 16 KB (1,881 words) - 00:04, 31 January 2024 |
Seismic velocity structure (section Upper mantle) 5 km/s Average S-wave velocity: 4.5–5.0 km/s Seismic velocity in the upper mantle rises primarily due to increased pressure, similar to the crust but with... 82 KB (7,558 words) - 12:18, 4 March 2024 |
The crust overlies the rigid uppermost layer of the mantle. The crust and the rigid upper mantle layer together constitute oceanic lithosphere. Oceanic... 15 KB (1,854 words) - 00:11, 16 March 2024 |
Iceland hotspot (section Upper mantle convection) the upper mantle. According to one of those models, a large chunk of the subducted plate of a former ocean has survived in the uppermost mantle for several... 34 KB (4,293 words) - 19:14, 30 April 2024 |
Subduction (redirect from Mantle cell) denser than the underlying asthenosphere, the hot, ductile layer in the upper mantle underlying the cold, rigid lithosphere. Once initiated, stable subduction... 67 KB (8,274 words) - 01:09, 10 April 2024 |
a division of Earth's layers that includes the crust and the upper part of the mantle. The lithosphere is broken into tectonic plates whose motion allows... 13 KB (1,642 words) - 02:12, 27 April 2024 |
large quantities in the Earth's mantle. Olivine, wadsleyite, and ringwoodite are polymorphs found in the upper mantle of the earth. At depths greater... 20 KB (2,109 words) - 17:49, 26 April 2024 |
Transition zone (Earth) (redirect from Mantle transition zone) Earth's mantle, and is located between the lower mantle and the upper mantle, between a depth of 410 and 660 km (250 to 400 mi). The Earth's mantle, including... 5 KB (615 words) - 18:13, 27 April 2024 |
Earth (section Upper atmosphere) within the mantle occur at 410 and 660 km (250 and 410 mi) below the surface, spanning a transition zone that separates the upper and lower mantle. Beneath... 218 KB (19,273 words) - 18:14, 30 April 2024 |
melting of the mantle. The high pressure in the upper mantle (due to the weight of the overlying rock) raises the melting point of mantle rock, so that... 69 KB (7,757 words) - 15:00, 25 April 2024 |
The core–mantle boundary (CMB) of Earth lies between the planet's silicate mantle and its liquid iron–nickel outer core, at a depth of 2,891 km (1,796 mi)... 9 KB (943 words) - 04:28, 7 March 2024 |
Pyrolite (section Other Mantle Rock models) Al2O3, 8.18 % FeO, 3.17 % CaO, 38.73 % MgO, 0.13 % Na2O. 1) A pyrolitic Upper Mantle is mainly composed of olivine (~60 volume percent (vol%)), clinopyroxene... 13 KB (1,440 words) - 20:15, 16 March 2024 |
otherwise inaccessible mantle. Basalts, kimberlites, lamproites and lamprophyres, which have their source in the upper mantle, often contain fragments... 7 KB (771 words) - 11:39, 28 October 2023 |
Pyroxenite (section Intrusive and mantle pyroxenites) products of reaction between ascending magmas and peridotite of the upper mantle. The layers typically are a few centimeters to a meter or so in thickness... 6 KB (749 words) - 19:20, 18 January 2024 |
Eclogite (section Surface versus mantle origin) gradients of <10 °C/km (29 °F/mi) as it is subducted to the lower crust to upper mantle depths in a subduction zone. Eclogites are defined as bi-mineralic, broadly... 18 KB (1,812 words) - 10:53, 5 January 2024 |
Ocean island basalt (section Mantle sources) structure of the mantle argued that the mantle was split into two reservoirs: the upper mantle and the lower mantle. The upper mantle was thought to be... 26 KB (2,892 words) - 15:14, 29 November 2023 |
Transition zone (Earth), a part of the Earth’s mantle located between the lower mantle and the upper mantle Transition zone, the region between the near... 478 bytes (105 words) - 00:31, 2 February 2020 |
not always coincide with the crust-mantle boundary defined by composition. Xenoliths (lower crust and upper mantle rock brought to the surface by volcanic... 15 KB (1,672 words) - 18:27, 8 April 2024 |