Glaciers, rivers, wind, and rain are a few of the elements that shape the landscape in powerful ways. They form features big and small--from grand canyons and enormous caves to smooth pebbles and fine grains of sand. Lyrical verse by Heather Ferranti Kinser introduces weathering, erosion, and deposition, and eye-catching photos provide a look at some of North America's geological marvels. Back matter gives more information about the processes that sculpt the landscape and highlights formations including Half Dome, a hoodoo, and basalt columns.