Holmes was a pioneer of geochronology, and performed the first accurate uranium-lead radiometric dating (specifically designed to measure the age of a rock) while an undergraduate in London, assigning an age of 370 Ma to a Devonian rock from Norway, improving on the work of Boltwood who published nothing more on the subject.
Sherlock Holmes | Arthur Conan Doyle | King Arthur | Arthur Miller | Arthur C. Clarke | Arthur | Arthur Ransome | Port Arthur | Chester A. Arthur | Arthur Balfour | Arthur Sullivan | Arthur Rubinstein | Arthur Andersen | Sir Arthur Conan Doyle | Prince Arthur, Duke of Connaught and Strathearn | Arthur Wellesley | Oliver Wendell Holmes, Jr. | Oliver Wendell Holmes, Sr. | Larry Holmes | Arthur Godfrey | Arthur Fiedler | Arthur Schopenhauer | Arthur Honegger | Oliver Wendell Holmes | Arthur Rimbaud | Arthur (TV series) | Arthur Machen | Arthur Askey | Eleanor Holmes Norton | Arthur Symons |
His work there led to the 1938 publication of measurements of the relative abundance of the isotopes of uranium, measurements that were used by Fritz Houtermans and Arthur Holmes in the 1940s to estimate the age of the Earth.