The asthenosphere (from Ancient Greek ἀσθενός (asthenós) 'without strength') is the mechanically weak and ductile region of the upper mantle of Earth... 18 KB (2,088 words) - 01:10, 10 April 2024 |
by the asthenosphere which is the weaker, hotter, and deeper part of the upper mantle that is able to convect. The lithosphere–asthenosphere boundary... 16 KB (1,881 words) - 00:04, 31 January 2024 |
the asthenosphere is hotter and flows more easily. In terms of heat transfer, the lithosphere loses heat by conduction, whereas the asthenosphere also... 112 KB (13,617 words) - 18:40, 26 April 2024 |
down. This releases water into the hotter asthenosphere, which leads to partial melting of the asthenosphere and volcanism. Both dehydration and partial... 20 KB (2,381 words) - 00:36, 12 April 2024 |
viscous asthenosphere. The oceanic lithosphere is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at ocean... 36 KB (4,662 words) - 15:55, 23 April 2024 |
as the result of the rigid lithosphere sliding down the hot, raised asthenosphere below mid-ocean ridges. Although it is called ridge push, the term is... 14 KB (1,593 words) - 10:05, 15 April 2024 |
trench formation can occur. The tectonic plates ride on top of the asthenosphere, the solid but less-viscous part of the upper mantle that can flow and... 218 KB (19,273 words) - 00:45, 30 April 2024 |
Isostasy (section Lithosphere-asthenosphere boundary) mantle, it has subsequently been interpreted in terms of lithosphere and asthenosphere, particularly with respect to oceanic island volcanoes, such as the... 22 KB (2,874 words) - 16:09, 3 February 2024 |
the cold oceanic lithosphere is slightly denser than the underlying asthenosphere, the hot, ductile layer in the upper mantle underlying the cold, rigid... 67 KB (8,274 words) - 01:09, 10 April 2024 |
relatively cooler oceanic crust, along with water, is subducted to the asthenosphere, where pressures and temperatures are much higher than the surface of... 14 KB (1,517 words) - 09:41, 22 December 2023 |
in cratons. Such an old continental crust and the underlying mantle asthenosphere are less dense than elsewhere on Earth and so are not readily destroyed... 13 KB (1,642 words) - 02:12, 27 April 2024 |
associated in almost all cases with partial melting of the overlying asthenosphere due to the addition of volatiles (especially water) expelled from the... 9 KB (1,035 words) - 17:40, 30 January 2024 |
the plastically deforming, solid, upper mantle, which is called the asthenosphere. This theory is supported by several types of observations, including... 87 KB (9,583 words) - 17:16, 26 April 2024 |
of subducted crust material. Crust material that is forced into the asthenosphere melts, and some portion of the melted material becomes light enough... 28 KB (3,331 words) - 14:51, 1 April 2024 |
the Earth is divided into an upper, lithosphere layer and a lower, asthenosphere layer. The lithosphere layer is composed of two parts, an upper, the... 8 KB (1,078 words) - 00:06, 23 October 2023 |
that move relative to each other on the underlying, relatively weak asthenosphere in a process ultimately driven by the continuous loss of heat from the... 14 KB (1,479 words) - 15:37, 20 April 2024 |
surface of Earth results in melting of the down-going slab and convecting asthenosphere. This melting may be assisted by the presence of water in what is known... 16 KB (2,022 words) - 02:24, 21 March 2024 |