The mid-ocean ridges form a world-encircling system that extends, with several side branches, along the Mid-Atlantic Ridge (the first to be discovered), running roughly north-south in the Atlantic, up, around and down through the Indian Ocean (the Mid-Indian Ridge), and across the Pacific (the Pacific-Antarctic Ridge).
Mid-ocean ridges are important sites of earthquakes and volcanic activity. See also ocean trench.
Mid-Atlantic RidgeThe Mid-Atlantic Ridge is an underwater topographic feature along the margin between the American crustal plate on one side and the European and African plates on the other. It runs for 14,000 kilometers (8,700 miles) along the middle of the Atlantic Ocean. Iceland is located on the ridge itself and was formed by outpourings of volcanic lava.
Related category GEOLOGY AND PLANETARY SCIENCE
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