Roadside Geology of Washington

The story of Washington geology is a matter of getting the pieces of the state together. As it moved West, the North American continent collected scraps of continental and oceanic crust once widely scattered over the vast emptiness of the eastern Pacific, and assembled them into the geologic mosaic that is Washington. But each of the pieces retains its distinctive character as a place once separate, still not completely assimilated into the larger whole. This book identifies the pieces of Washington, points out the seams between them, and tells how and when they got to where we know them now.