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Benioff zone

[ben-ee-awf, -of] /ˈbɛn iˌɔf, -ˌɒf/
noun, Geology, Oceanography
1.
a planar seismic zone in oceanic crust along which subduction of lithospheric plates gives rise to frequent earthquakes: marked by oceanic trenches sloping downward at about 45° toward adjacent island arcs or continents.
Origin
after Hugo Benioff (1899-1968), U.S. geophysicist
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for benioff-zone

Benioff zone

/ˈbɛnɪəf/
noun
1.
a long narrow region, usually adjacent to a continent, along which earthquake foci lie on a plane which dips downwards at about 45° and along which the oceanic lithosphere is thought to be descending into the earth's interior Compare subduction zone
Word Origin
C20: named after Hugo Benioff (1899–1968), American seismologist, who first discovered the phenomenon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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