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Asthenosphere

The layer below the lithosphere that is marked by low seismic-wave velocities and high seismic-wave attenuation.

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  • Part of Speech: noun
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  • Industry/Domain: Earth science
  • Category: Seismology
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Related terms

asthenosphere
Natural environment; Coral reefs

A layer of soft but solid, mobile rock comprising the lower part of the upper mantle from about 100 to 350 km beneath the Earth's surface.

asthenosphere
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The upper part of the Earth's mantle. The asthenosphere lies beneath the lithosphere and is made of several hundred miles of partially molten rock.

asthenosphere
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The shell within the earth, some tens of kilometers below the surface and of undefined thickness, which is a shell of weakness where plastic movements take place to permit ...

asthenosphere
Earth science; Geology

The weak or "soft" zone in the upper mantle just below the lithosphere , involved in plate movement and isostatic adjustments. It lies 70 to 100 km below the surface and may ...

asthenosphere
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Layer of rock in the mantle approximately 80km deep and at a temperature of 1400°c. Rocks here become much softer and more easily deformed than in the lithosphere above.

asthenosphere
Natural environment; Earthquake

The soft and probably partly molten layer of the earth below the lithosphere. Distinguished by low seismic-wave velocities and high seismic wave attenuation .

seismic survey
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A technique for determining the detailed structure of the rocks underlying a particular area by passing acoustic shock waves into the strata and detecting and measuring the ...

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Earth science; Seismology

A member of a seismic crew who operates the geophones.

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An exploration technique involving the use of seismic methods.

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A seismic observer operates geophysical recording instruments used in seismic surveys and performs routine maintenance to ensure optimum data quality.

scarp
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A roughly linear, cliff-like slope or face that breaks the continuity of a surface into distinct levels. Scarps are often produced by faulting, especially that which involves a ...

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