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Askja(äs`kyä), volcano, c.4,950 ft (1,510 m) high, E central Iceland; one of the highest in Europe. Its great eruption of 1875 devastated a large area; Askja last erupted in 1961. Askja caldera, surrounded by mountains of tuff, contains Öskjuvatn, a crater lake c.550 ft (170 m) deep.
a volcano in E central Iceland: active in 1961; largest crater in Iceland. Height: 1510 m (4954 ft.). Area of crater: 88 sq. km (34 sq. miles)