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Ash Plume across the North Atlantic
...Eyjafjallajökull (or Eyjafjöll) is a stratovolcano composed of alternating layers of ash, lava, and rocks ejected by earlier eruptions. This volcano rises to a height of 1,666 meters (5,466 feet) above sea level. It began erupting for the first time in 190 years on March 20, 2010. The eruption opened a 500-meter (2,000-foot) fissure, and also produced lava fountains that built several hills of bubble-filled lava rocks (scoria) along the vent.