Gary L. Prost obtained his BSc in Geology from Northern Arizona University and a MSc and PhD Geology from Colorado School of Mines. He worked over 40 years in the minerals and energy industries for the U.S. Geological Survey, The Superior Oil (and Minerals) Company, Amoco Production Company, Shell Oil, Gulf Canada, and ConocoPhillips Canada. He has written a geologic handbook for the general public and has published a series on self-guided geologic tours of the world. Now retired, Dr. Prost leads geologic tours for the public and professionals and is dedicated to making geology accessible to the average person.