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Earth's outer core is a liquid layer about 2,266 km (1,408 mi) thick composed of iron and nickel that lies above Earth's solid inner core and below its mantle. Its outer boundary lies 2,890 km ...
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The Lehmann discontinuity refers to an abrupt increase of P-wave and S-wave velocities at the depth of 220±30 km, discovered by seismologist Inge Lehmann. It appears beneath continents, but not usuall ...
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Earth's inner core is Earth's innermost part and is a primarily solid ball with a radius of about 1,220 km (760 mi), according to seismological studies. (This is about 70% of the Moon's ra ...
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Harry Lehmann (March 21, 1924, G?strow ? November 22, 1998, Hamburg) was a German physicist.Lehmann studied physics at Rostock and the Humboldt-Universit?t zu Berlin.In 1952 he worked at the Max-Planc ...
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