Robert Fleming Heizer was one of two towering figures who dominated Great Basin archaeology after World War II. Heizer, of the University of California at Berkeley, focused on understanding the sequences of past periods of occupation. The other, Jesse Jennings of the University of Utah, worked with Great Basin prehistoric sites, developing the notion of the Desert Archaic Lifeway. Heizer excavated at Nevada's Lovelock Cave, Humboldt Cave, and Eastgate Cave, and his students excavated numerous caves throughout Northern Nevada.