The Richard Dixon Oldham reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Richard Dixon Oldham

Richard Dixon Oldham was a British geologist who, in 1906, argued that the Earth must have a molten interior as S waves were not able to travel through liquids nor through the Earth's interior.

See also: Lehmann, Inge, seismology

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