Allen GlaznerAllen F. Glazner, a former student of Bob Sharp's and his coauthor on the first edition, received in PhD in geology form UCLA and is currently professor emeritus of geology at the University of North Carolina at Chapel Hill. A native Californian, he as conducted geological research in the Sierra Nevada and the Mojave Desert since his undergraduate days at Pomona College. He is also the coauthor of "Geology Underfoot in Death Valley and Owens Valley" and "Geology Underfoot in Yosemite." Read More Read Less