The Man: Geologists accept Ice Age floods theory, honor Bretz with Penrose Medal

Plaque dedicated to J. Harlen Bretz

Bretz's theory was contested by geologists who objected to "catastrophist" explanations for geomorphology. But by the mid-1950s he had gained substantial support, and by the 1970s his flood hypothesis prevailed. His fellowgeologists eventually honored him with the 1979 Penrose medal, thehighest honor of the Geological Society of America, shortly before his death.