Terry Maley has B.S. and M.S. degrees in geology from Oregon State University and a Ph.D. in geology from the University of Idaho. He has been an avid field observer, photographer, and illustrator of geological features during more than 50 years of fieldwork. Now retired, he worked many years for the Department of the Interior conducting geologic investigations throughout the western United States. Before joining the Interior Department, Terry was a marine geologist of the U.S. Naval Oceanographic Office for eight years participating in 15 worldwide expeditions. He also served as Administrator for the Idaho Division of Earth Resources for five years with responsibility over all mineral resources, water resources, and geological research in Idaho. He has authored more than 50 technical papers on geological features and has written ten books on regional geology, field geology and mineral law. He recently published Idaho Geology, Introduction to Plate Tectonics: Origin, Islands and Archipelagos and the Ocean Floor and Exploring Northwest Geology: How Plate Tectonics Created the Landscapes of the American Northwest.