asthenosphere

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English[edit]

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Wikipedia

Etymology[edit]

From Ancient Greek ἀσθενής (asthenḗs, weak) + sphere.

Pronunciation[edit]

  • (UK) IPA(key): /asˈθɛnə(ʊ)sfɪə/

Noun[edit]

asthenosphere (plural asthenospheres)

  1. (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 top of the asthenosphere suggests a degree of easy buoyancy that isn't quite right.
    • 2004, Richard Fortey, The Earth, Folio Society 2011, p. 79:
      The asthenosphere that underlies the surface plates is not liquid in any vernacular sense, although it is relatively plastic.

Translations[edit]