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News: Did Humans Colonize the World by Boat?
Research suggests our ancestors traveled the oceans 70,000 years ago
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EXPLORING THE OCEAN BASINS WITH SATELLITE ALTIMETER DATA

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Author Topic: EXPLORING THE OCEAN BASINS WITH SATELLITE ALTIMETER DATA  (Read 2031 times)
Karissa Oleyanin
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« on: February 01, 2009, 02:16:39 am »

Undersea Volcanoes
The global gravity grids reveal all volcanoes on the seafloor greater than about 1000 m tall. Approximately 1/2 of these volcanoes were not charted previously. One of the more important aspects of these new data will be to locate all of these volcanoes and identify spatial patterns that may help determine how they formed. Many volcanoes appear in chains, perhaps associated with mantle plumes, there are many more that do not fit this simple model. Moreover, numerous undersea volcanoes are long linear ridges with aspect ratios of 20 or more. These features suggest that the plates are not exactly ridged as predicted by the simple plate tectonic theory. Using these data we are exploring the internal deformations of the plates, especially outboard of trenches where the forces generated by the slab-pull force of the subducted plates is greatest.

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