Have you ever wondered what a badland is? What about a gulch? Do you wonder what an isthmus is? Or a seamount? What about the difference between a plateau and a plain, or a knob and a knoll? The sixty-three entries from A to Z describe the earth’s features — its physical geography — from the highest mountain peak to the deepest ocean trench, in clear, concise terms. Each entry is beautifully illustrated in full color.