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Unformatted text preview: Above: the upper mantle and lithosphere, showing S-wave velocity variation derived from seismic wave travel time inversions. The main (Mg, Fe) silicate minerals are shown, with distinct transitions from olivine to spinel to perovskite being accompanied by changes in S-wave speed. The wave speed drops below the lithosphere in the so-called ‘low velocity zone’ making up the upper asthenosphere. Below: normal modes for the whole Earth Further study Revise the A-W equation with Q. 13....
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This note was uploaded on 09/12/2011 for the course ECON 102 taught by Professor Gavinbell during the Spring '11 term at LSE.
- Spring '11