Author Michael Collier brings to life Denali's slow-moving landscape of rock and ice, compressing the eras of geologic time so that glaciers ebb and flow, mountains rise, new rocks are formed from hot magma, and river gravel flows like water toward the sea. From the origins of Polychrome's many colors to the reason for Mount McKinley's enormous size, here complicated geologic concepts are explained in an easy-to-read text that is accompanied by detailed illustrations and telling photographs. Award-winning author Michael Collier spends most of his time combining geology, photography, and aeronautics, in a three-decade quest to tell the earth's stories. He is the author of Sculpted by Ice: Glaciers and the Alaska Landscape and has published numerous books about the geology of national parks and the Southwest, and wrote and photographed books on the San Andreas Fault, downstream effects of dams, and climate change as a special projects writer for the USGS. When he's not snapping photos or flying his plane, Collier spends half his time as a family practice doctor in Arizona. AWARDS: 1997 USGS Shoemaker Communications Award and a 2000 National Park Service Director's Award.