The longest mountain chain on earth. #midatlanticridge

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The mid ocean ridge systems are the largest geological features on the planet. The Mid-Atlantic Ridge (MAR) is a mostly underwater mountain range in the Atlantic Ocean that runs from 87°N -about 333km south of the North Pole- to subantarctic Bourvet island at 54°S. The MAR is about 3 km in height above the ocean floor and 1000 to 1500 km wide, has numerous transform faults and an axial rift valley along its length.

The ridge was discovered in the 1950s. Its discovery led to the theory of seafloor spreading and general acceptance of Wegener’s theory of continental drift.

Source: http://whc.unesco.org/en/activities/504/