Book excerpt: This Volume describes the processes that shape ocean basins, determine the structure and composition of the ocean crust, and control the major features of the continental margins. Further subjects examined are the 'hot springs' of the deep oceans, the main pattern of sediment distribution in ocean basins including the recording of past climatic and sea-level changes, and the role of oceans as an integral part of global chemical cycles. Each Volume in this set is well laid out and copiously illustrated with full colour photographs, graphs and graphics. Questions to help develop arguments and/or understanding can be found in the text and at the end of each chapter, with worked answers provided at the back of each Volume. Each chapter also concludes with a sum mary to help consolidate understanding before the next chapter is begun.