Under Michigan: The Story of Michigan's Rocks and Fossils

Most people recognize Michigan by its mitten-shaped Lower Peninsula and the Great Lakes embracing the state. Underneath the earth's surface, however, is equally distinctive evidence of an exciting history. Michigan rests on sedimentary rocks that reach down into the earth's crust more than fourteen thousand feet—a depth three-and-a-half times deeper than the Grand Canyon. Within these layers of rock rest all sorts of ancient...