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Satellite gravity map of the western Indian and southern Atlantic Ocean basins.

Satellite gravity map of the western Indian and southern Atlantic Ocean basins.
Satellite gravity map of the western Indian and southern Atlantic Ocean basins.
Satellite gravity map of the western Indian and southern Atlantic Ocean basins.
Satellite gravity map of the western Indian and southern Atlantic Ocean basins.
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598925
Georgen, Jennifer
Satellite gravity map of the western Indian and southern Atlantic Ocean basins.
Illustration
01/01/1998
lin.fig2.jpg
Date is approximate.
Caption from Oceanus magazine, Vol. 41, No. 2, Pg. 37:
Satellite gravity map of the western Indian and southern Atlantic Ocean basins, as revealed by satellite gravity data. A string of hotspots (Tristan, Gough, Discovery, and Shona) aligned with the southern Mid-Atlantic Ridge (MAR) may be contributing magma supplies that maintain the ridge. The Bouvet hotspot may play a critical role in maintaining the triple junction, where three mid-ocean ridge branches and the three boundaries (white lines) separating the South American, Antarctic, and African plates all intersect. Farther east, the Kerguelen, Crozet, and Marion hotspots may have
extensively shaped the seafloor of the southern ocean. SEIR is the Southeast Indian Ridge, CIR is the Central Indian Ridge, and SWIR is the Southwest Indian Ridge.
Map produced by Jennifer Georgen, MIT-WHOI Joint Program, with data from David Sandwell, Scripps Institution of Oceanography, and Walter Smith, NOAA.
© Woods Hole Oceanographic Institution
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