John Geissman presents a general overview of the geology of New Mexico, with a brief but important introduction to the general concepts of deep geologic time and the overall geologic setting of the western United States. Geissman includes a summary of the history of geologic changes that have affected New Mexico and briefly touches on the origin of these changes.

John Geissman is a professor emeritus of geoscience at the University of Texas at Dallas and the University of New Mexico. He received a BS, MS, and PhD in Geology (now Earth and Environmental Sciences) from the University of Michigan. He is a Past President of the Geological Society of America as well as the editor for the GSA Bulletin. He has over 300 peer-reviewed science journal contributions.