This Geologist’s Theory of a Catastrophic Flood Changed Our Understanding of Earth
Science is constantly evolving, and even ideas once accepted as fact can eventually be proven wrong. In the 1920s, geologist J Hardlen Bretz challenged one of the dominant ideas of his time. He believed that the landscape of eastern Washington State had been carved by enormous prehistoric floods—not the slow, gradual erosion that most geologists thought was responsible.













































































