Jökulsá

Jökulsá yö´külsou [key], name of several Icelandic rivers formed by glaciers. The best known is the Jökulsá á Fjöllum, which rises on the north slope of the Vatnajökull in SE Iceland and flows c.130 mi (210 km) N into the Öxarfjörður bay, forming the Dettifoss, one of four waterfalls on the river and one of Europe's most powerful waterfalls, c.30 mi (50 km) from its mouth below the falls, the falls the river flows through the Jökulsárgljúfur, a canyon that is 390 ft (120 m) deep in places.

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