Geology of the United States' Seafloor presents new, definitive studies of the seafloor adjacent to various regions of the United States--the West Coast, East Coast, Alaskan margin, Gulf of Mexico and the Caribbean--from the GLORIA long-range sidescan sonar images, complementary seismic profiling, and magnetic surveys. This spectacular dataset provides a new insight into the structural evolution of the seafloor, and the sedimentary processes that have modified it. Such a comprehensive interpretation of the images, in the context of the geology and geological processes of the seafloor, is presented here for the first time. New concepts have emerged and scientists have garnered much new knowledge as a result of this surveying. Geology of the United States' Seafloor will be useful to the broad range of advanced students and scientists studying the continental margins and the seafloors of the world.