asthenospheren.

/asˈθɛnəʊsfɪə/

Etymology: < Greek ἀσθενής weak ( < Greek ἀ- privative + σθένος strength) + -o suffix + sphere n.

Geology.

(See quot. 1914.)

ΘΚΠ

the world > the earth > structure of the earth > [noun] > geosphere > tectosphere

tektosphere1900

asthenosphere1914

tectonosphere1926

tectosphere1968

1914 J. Barrell in Jrnl. Geol. (Chicago) 22 659 The theory of isostasy shows that below the lithosphere there exists in contradistinction a thick earth-shell marked by a capacity to yield readily to long-enduring strains of limited magnitude... Its comparative weakness..is its distinctive feature. It may then be called the sphere of weakness—the asthenosphere.

1915 Jrnl. Geol. (Chicago) 23 43 The weakest part of the asthenosphere is of the order of one-hundredth of the maximum strength of the lithosphere.

1922 Encycl. Brit. XXXI. 214/1 A yielding but not necessarily molten layer, Barrell's asthenosphere..which lies some 80 to 100 m...below the general surface of the geoid.

1966 New Scientist 10 Mar. 635/1 The seat of crustal upheavals may be the so-called ‘asthenosphere’ or low-velocity layer in the Earth's upper mantle.

This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2021).

单词	asthenosphere
释义	asthenospheren. /asˈθɛnəʊsfɪə/ Etymology: < Greek ἀσθενής weak ( < Greek ἀ- privative + σθένος strength) + -o suffix + sphere n. Geology. (See quot. 1914.) ΘΚΠ the world > the earth > structure of the earth > [noun] > geosphere > tectosphere tektosphere1900 asthenosphere1914 tectonosphere1926 tectosphere1968 1914 J. Barrell in Jrnl. Geol. (Chicago) 22 659 The theory of isostasy shows that below the lithosphere there exists in contradistinction a thick earth-shell marked by a capacity to yield readily to long-enduring strains of limited magnitude... Its comparative weakness..is its distinctive feature. It may then be called the sphere of weakness—the asthenosphere. 1915 Jrnl. Geol. (Chicago) 23 43 The weakest part of the asthenosphere is of the order of one-hundredth of the maximum strength of the lithosphere. 1922 Encycl. Brit. XXXI. 214/1 A yielding but not necessarily molten layer, Barrell's asthenosphere..which lies some 80 to 100 m...below the general surface of the geoid. 1966 New Scientist 10 Mar. 635/1 The seat of crustal upheavals may be the so-called ‘asthenosphere’ or low-velocity layer in the Earth's upper mantle. This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2021). < n.1914
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