Review of Short Phrases and Links|
This Review contains major "Lithosphere"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- The lithosphere is a boundary layer above the convecting upper mantle, influencing convection in a manner that has not yet been well determined or modeled.
- Lithosphere: The rigid crust and uppermost mantle of the earth.
- The lithosphere is a more fixed, rigid, cooler substance than the hotter, mechanically weaker asthenosphere.
- The lithosphere is the rigid outermost layer made of crust and uppermost mantle.
- Lithosphere is the "strong" outer part of Earth, about 100-200 km thick.
- The lithosphere is the brittle outer layer of the solid Earth.
- The lithosphere is the "plate" of the plate tectonic theory.
- The lithosphere is the solid outermost shell of a rocky planet.
- In the theory of plate tectonics the outermost part of the Earth 's interior is made up of two layers, the outer lithosphere and the inner asthenosphere.
- The lithosphere is cooler and more rigid, whilst the asthenosphere is hotter and mechanically weaker.
- Students can describe what happens to lithosphere at each of the three plate boundary types (divergent, convergent, transform).
- The third boudary is Transform fault boundaries which is when two boundaries grind past each other without the production or detruction of lithosphere.
- McGeary and Plummer (1998) say that these findings cast doubt on the original, simple lithosphere-asthenosphere model of plate behavior.
- It is at subduction zones that the Earth's lithosphere, oceanic crust, sedimentary layers, and trapped water are recycled into the deep mantle.
- Excluding subduction zones, earthquakes are limited to (A) the asthenosphere, (B) the Moho, (C) the lithosphere, or (D) granite.
- Subduction zones mark sites of convective downwelling of the Earth's lithosphere (the crust plus the strong portion of the upper mantle).
- The lithosphere is underlain by the asthenosphere, the weaker, hotter, and deeper part of the upper mantle.
- Within the crust and upper mantle there is also an inferred mechanical layering distinguishing lithosphere, asthenosphere and mesosphere.
- Subduction zones exist at convergent plate boundaries where one plate of oceanic lithosphere converges with another plate and sinks below into the mantle.
- Oceanic lithosphere is less dense than asthenosphere for a few tens of millions of years, but after this becomes increasingly denser than asthenosphere.
- A subduction zone is a region where the oceanic lithosphere descends into the mantle.
- Most of the other plates consist of both oceanic and continental lithosphere.
- Edge effects: thick continental lithosphere insulates the underlying asthenosphere, causing heat buildup that leads to buoyancy.
- The tectonic consequences of such lithosphere replacement would include uplift and magmatism, and basin formation during subsequent thermal relaxation.
- Young oceanic lithosphere forms at the oceanic ridge system and is consumed at trenches.
- Both types of lithosphere can exist within a single plate, for example the North American plate has both continental and oceanic lithosphere.
- The key principle of plate tectonics is that the lithosphere exists as separate and distinct tectonic plates, which "float" on the fluid-like asthenosphere.
- Below the lithosphere lies the asthenosphere.
- Also, the lithosphere loses heat by conduction whereas the asthenosphere also transfers heat by convection and has a nearly adiabatic temperature gradient.
- The lithosphere essentially floats on the asthenosphere.
- The buoyant asthenosphere moves toward the edge of the cratonic lithosphere, where it can rise and melt (e.g., Anderson, 2005).
- Where lithosphere on the downgoing plate is too buoyant to subduct, a collision occurs, hence the adage "Subduction leads to orogeny ".
- These form where fluids released from the downgoing plate percolate upwards and interact with cold mantle lithosphere of the forearc.
- This bulge is thought to be caused by upward convective forces in the asthenosphere pushing the oceanic crust and lithosphere.
- SPOHN, T. & SCHUBERT, G. 1982. Convective thinning of the lithosphere: a mechanism for the initiation of continental rifting.
- These are earthquakes that occur at a depth at which the subducted lithosphere should no longer be brittle, due to the high temperature and pressure.
- Subduction involves the whole lithosphere, the density of which is largely controlled by the nature of the crust it carries.
- Seismic tomography has helped outline subducted lithosphere in regions where there are no earthquakes.
- The lithosphere is broken up into what are called tectonic plates —in the case of Earth, there are seven major and many minor plates ( see list below).
- Hot-spot volcanoes often form long chains that result from the relative motion of the lithosphere plate over the hot-spot source.
- Continental lithosphere is stiffer and thicker than oceanic lithosphere -often 100-200 km thick and up to 250 km deep along cratonic keels.
- The theory states that the Earth's lithosphere is divided into plates (about 100 km thick) that move around on top of the asthenosphere.
- It is thought that convection currents in the Earth 's mantle rise to the base of the lithosphere where the divergent plate boundary exists.
- The lithosphere contains both crust and some mantle.
- As oceanic lithosphere is formed at spreading ridges from hot mantle material it gradually cools and thickens with age (and thus distance from the ridge).
- Because it contains thick continental crust, this lithosphere is less dense than the underlying asthenospheric mantle and normal subduction is disrupted.
- Where plates collide, the lithosphere on one plate is forced downward into the hot mantle.
- The lithosphere (from the Greek, lithos, stone) is the rigid outermost layer made of crust and uppermost mantle.
- A given piece of mantle may be part of the lithosphere or the asthenosphere at different times, depending on its temperature, pressure and shear strength.
- On the Earth, the lithosphere includes the crust and the uppermost mantle which is joined to the crust across the Mohorovi--i-- discontinuity.
- The lithosphere is composed of the crust and the solidified uppermost part of the mantle.
- The asthenosphere is a subdivision of the mantle that is below the lithosphere and may be 100 to 700 kilometers below the surface.
- The lithosphere beneath passive margins is known as transitional lithosphere.
- The accumulation of sediments above the subsiding transitional crust and lithosphere further depresses the transitional crust.
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