Richard Dixon Oldham | |
|---|---|
 Richard Dixon Oldham | |
| Born | 31 July 1858 |
| Died | 15 July 1936 (age 77) |
| Nationality | British |
| Known for | measuring Earth's core; separate arrival of seismic phases |
| Scientific career | |
| Fields | Geology |
Richard Dixon Oldham FRS (/ˈoʊldəm/; 31 July 1858 – 15 July 1936) 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.