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rmed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches.]]
'''Marine geology''' or '''geological oceanography''' is the study of the history and structure of the ocean floor. It involves [[geophysical]], [[geochemistry|geochemical]], [[sedimentology|sedimentological]] and [[paleontological]] investigations of the [[ocean floor]] and [[coastal zone]]. Marine geology has strong ties to [[geophysics]] and to [[physical oceanography]].f
Marine geological studies were of extreme importance in providing the critical evidence for [[sea floor spreading]] and [[plate tectonics]] in the years following World War II. The deep ocean floor is the last essentially unexplored frontier and detailed mapping in support of both military (submarine) objectives and economic ([[petroleum]] and [[metal]] [[mining]]) objectives drives the research.
==Overview==
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