Dr. Bullard was world-renowned for his contributions to the study of volcanoes. Beginning in 1929, he carried out research on volcanic eruptions in various regions of the world, including South America, Japan, Greece, and New Zealand. His Volcanoes of the Earth is considered a standard on the subject. He was appointed a distinguished lecturer for the American Association of Petroleum Geologists in 1945 and 1954. He retired from the University in 1971.
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