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Gravity Map Uncovers Sea-Floor Surprises

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Atlantic quakes

The gravity model of the North Atlantic ocean basin reveals tectonic history in sharp detail. Red dots show the location of past earthquakes of magnitude 5.5 or higher.

Credit: David Sandwell, Scripps Institution of Oceanography

As though someone had pulled a plug in the oceans and drained them away, a sea-floor map has exposed thousands of never-before-seen underwater mountains and ridges.

From Nature
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