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Grímsvötn,volcano, Iceland: see VatnajökullVatnajökull
, glacier, c.3,150 sq mi (8,160 sq km), SE Iceland; largest glacier in Europe. At an elevation of from 4,200 to 6,100 ft (1,280–1,860 m), it covers a huge volcanic plateau, which includes the Grímsvötn caldera, Iceland's third largest and
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