Coasts provide an almost endless variety of complex forms, influenced by tectonics, upland morphology, local and global climate, biology, chemistry, and the activities of man. In Coasts, Richard A. Davis reduces the complexity by classifying coasts into subtypes, such as beaches, inlets, deltas, barrier islands, and so forth. The emphasis is on the coasts of the United States, but examples from throughout the world are included. Differences within the subtypes brought about by latitude, position relative to ocean basins, upland features, and a variety of other causes are described and clearly explained.