Zone in the Earth's mantle that exhibits plastic properties. Located below the lithosphere at between 100 and 200 kilometers.

The relatively plastic layer of the upper mantle of the Earth on which the tectonic plates of the lithosphere move. The asthenosphere is approximately 200 km [124 miles] thick and, owing to its depth [..]

The weak or "soft" zone in the upper mantle just below the lithosphere , involved in plate movement and isostatic adjustments. It lies 70 to 100 km below the surface and may extend to a depth of 400 km. Corresponds to the seismic low-velocity zone .

layer of the Earth's upper mantle, 1914, from Greek asthenos (see asthenia) + sphere.

layer in Earth's mantle between the lithosphere (above) and the upper mantle (below).

The asthenosphere is the ductile part of the earth just below the lithosphere, including the upper mantle. The asthenosphere is about 180 km thick.

layer of rock in the mantle approximately 80km deep and at a temperature of 1400°C. Rocks here become much softer and more easily deformed than in the lithosphere above.

A soft, solid layer of the Earth’s mantle that flows slowly and moves the Earth’s plates. It’s located approximately 100-200 kilometres below ground level.

(n) - the upper part of the mantle with which crust rests on

the worldwide weak layer below the lithosphere, marked by low seismic wave velocities and high seismic wave attenuation. This is a region of the Earth's mantle which begins at a depth of about 50 [..]

The rocky substratum below the lithosphere that is hot enough to be deformed and is capable of internal flow.

the upper part of the Earth's mantle, where the rocks are more fluid

[noun] The semi-molten layer of the earth which starts at ~70-200 km depth and ends at 660 km depth. The asthenosphere is part of the mantle, and is composed primarily of the rock peridotite. The asthenosphere can flow very slowly, allowing rigid pieces of the lithosphere to move around on top of it. Appears in modules:

the molten (melted) and flowing (plastic) part of the mantle where convection occurs. Atmosphere

a weak layer of the mantle below the lithosphere, which deforms plastically when subjected to stress

(n) the lower layer of the crust

Partly molten layer of the Earth that lies below the lithosphere (Lesson 26)

the partially melted portion of the upper mantle in the earth's interior. Hot magma from the asthenosphere rises out of the sea floor during submarine volcanic eruptions.

Partially molten layer below the lithosphere that is marked by low seismic wave velocities and high seimic attenuation.

The uppermost layer of the mantle

The uppermost layer of the mantle, located below the lithosphere. This zone of soft, easily deformed rock exists at depths of 100 kilometers to as deep as 700 kilometers. more details...

The layer or shell of the Earth below the lithosphere, which has reduced yield strength, permitting viscous or plastic flow under relatively small stresses; it is a zone in which isostatic adjustments take place, magmas may be generated, and seismic waves are strongly attenuated. It is a part of the upper mantle. Authorized capital

(geology) The zone of the Earth's upper mantle, below the lithosphere. * '''2003''', Bill Bryson, ''A Short History of Nearly Everything'', BCA, p. 192: *: To say that the lithosphere floats on to [..]

the layer in the Earth below the lithosphere that is weak, probably due to the presence of some molten material. It is this weak layer that allows the tectonic plates to move.