asthenosphere: Meaning and Definition of
Pronunciation: (as-then'u-sfēr"), [key]
— n. Geol.
- the region below the lithosphere, variously estimated as being from fifty to several hundred miles (eighty-five to several hundred kilometers) thick, in which the rock is less rigid than that above and below but rigid enough to transmit transverse seismic waves.
- asthenosphere (Thesaurus)
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