Jökulsárgljúfur canyon, Iceland from georadek

Jökulsárgljúfur is a canyon located in Norðurland eystra (North-east) Iceland. The valley is built of volcanic rocks, including basalt and the basaltic columns (columnar basalt) are common here. The Jökulsá á Fjöllum river flows here. The canyon has been formed during the last 10.000 years and the under-glacier volcanic eruptions causing jökulhlaup or chaotic floods played a significant role in the process. Selfoss, Dettifoss, Hafragilsfoss waterfalls are located here and Dettifoss is regarded as the most powerful waterfall in Europe meaning that this is the one with the greatest flow of water. Jökulsárgljúfur is located in the northern part of Vatnajökull National Park (Vatnajökulsþjóðgarður), which is the largest national park in Europe.

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