Education
He obtained the Ph.D. degree from the University of Chicago in 1925.
He obtained the Ph.D. degree from the University of Chicago in 1925.
Thereafter he taught at Yale University, where he was named professor of geology in 1945. He became chairman of the board of the Geochronometric Laboratory in 1950. Flint also became a senior geologist for the United States Geological Survey in 1946 and served on state geological surveys of Missouri, Kentucky, Illinois, and Connecticut. He was senior scientist on the Louise Arner Boyd Arctic Expedition in 1937. Flint is recognized as an authority on the geology of the North American arctic regions. He wrote Glacial Geology and the Pleistocene Epoch (1947) and was chairman of the compilation committee of the Glacial Map of North America (1945). He became an associate editor of the American Journal of Science in 1930. He collaborated in writing An Introduction to Physical Geology (1955).