Babylon 10
The world's best online dictionary

Download it's free

Definition of Asthenosphere

Babylon English

one of the layers of the interior of the Earth, upper part of the Earth's mantle
Asthenosphere Definition from Language, Idioms & Slang Dictionaries & Glossaries
WordNet 2.0

1. the lower layer of the crust
(hypernym) layer
(part-holonym) crust, Earth's crust
Asthenosphere Definition from Religion & Spirituality Dictionaries & Glossaries
Webart Magic Astronomical Glossary
In a planetary body, a subsurface layer that is more plastic than adjacent layers because the combination of pressure and temperature places it near (or slightly above) the melting point. Asthenospheric movements may disrupt the planet's surface.
Asthenosphere Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
Asthenosphere Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
The zone inside the earth beneath the Lithosphere constituting the source of Igneous rock (Magma).
Asthenosphere Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
The asthenosphere (from Greek asthenēs (ἀσθενὲς) 'weak' + sphere) is the highly viscous, mechanically weak and  ductilely-deforming region of the upper mantle of the Earth. It lies below the lithosphere, at depths between ~80 and ~200 km (~ 50 and 124 miles) below the surface. The lithosphere-asthenosphere boundary is usually referred to as LAB. Asthenosphere is generally solid although some of its regions could be melted (e.g. below mid-ocean ridge). The lower boundary of the asthenosphere is not well defined. The thickness of the asthenosphere depends mainly on the temperature. For some regions asthenosphere could extend as deep as . It is considered the source region of  mid-ocean ridge basalt (MORB).

See more at
© This article uses material from Wikipedia® and is licensed under the GNU Free Documentation License and under the Creative Commons Attribution-ShareAlike License