Richard Dixon Oldham
Richard Dixon Oldham FRS was a British geologist who made the first clear identification of the separate arrivals of P-waves, S-waves and surface waves on seismograms and the first clear evidence that the Earth has a central core.
From *.wikipedia.org,
General Info
.
Male
Date of Birth
July 31st, 1858
Age
167
Birth Place
Ireland
Date of Death
July 15th, 1936
Died Aged
77
Star Sign
Leo
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