Alba Patera


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Alba Patera

(al -bă) Probably the largest central-vent volcanic structure on Mars. Located north of the Tharsis Ridge, it is centered on the aerographic coordinates 40° N latitude, 109° W longitude (see areography). It has a low dome containing a central caldera and enclosed by a ring of fractures 600 km in diameter. Associated lava flows cover an area more than 1500 km across. See Mars, volcanoes.