H. Robert Burger is Achilles Professor Emeritus of in the Department Geosciences at Smith College. He is a structural geologist with research interests in comparison of the structural evolution of Death Valley and the Connecticut Valley and geophysical imaging of the Connecticut Valley structure. Anne F. Sheehan is Director of the Cooperative Institute for Research in Environmental Sciences and a Professor in the Department of Geological Sciences at the University of Colorado, Boulder. Her research group addresses problems in earthquake seismology, tsunami studies, active tectonics, and geophysical imaging of the subsurface. Craig H. Jones is a Professor in the Department of Geological Sciences at the University of Colorado, Boulder. His main research interest is in the origin of mountains and elevated topography in continents, primarily in the western U.S. As well as the current textbook, he is the author of The Mountains that Remade America: How Sierra Nevada Geology Impacts Modern Life (University of California Press, 2017).