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Caldera, Iceland. The largest crater in the Dyngjufjöl volcanic massif, Askja lies 20 mi (32 km) north of Vatnajökull (Vatna Glacier), Iceland's largest ice field. Its rugged peaks, up to 4,973 ft (1,516 m), encircle a lake of 4.25 sq mi (11 sq km) that occupies the caldera. The volcano erupted in 1875 and again in 1961.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Askja, visit Britannica.com.
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