![]() We found an extinct spreading ridge in the Gulf of Mexico, a major propagating rift in the South Atlantic Ocean, abyssal hill fabric on slow-spreading ridges, and thousands of previously uncharted seamounts. We combined new radar altimeter measurements from satellites CryoSat-2 and Jason-1 with existing data to construct a global marine gravity model that is two times more accurate than previous models. Gravity models are powerful tools for mapping tectonic structures, especially in the deep ocean basins where the topography remains unmapped by ships or is buried by thick sediment. View the new gravity map in an online 3D portal! New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure. New global marine gravity model from Cryo-Sat-2 and jason-1 reveals buried tectonic structure.
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