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This seafloor map shows the area along the Mid-Atlantic Ridge (MAR) where WHOI geophysicist Deborah Smith and colleagues found core complexes in various stages of formation. It is located between Africa and South America between the Marathon and Fifteen Twenty fracture zones. Stars in the left panel indicate known hydrothermal vent fields along the mid-ocean ridge (indicated by the black line). Red dots on the right panel indicate seismic activity?earthquakes, volcanic eruptions, or submarine landslides?that the scientists detected using underwater hydrophones. (Deborah Smith, Woods Hole Oceanographic Institution)[back]
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