Trolladyngja

This article covers the mountain in the Icelandic highlands, for the mountain of the same name on the Reykanesskagi peninsula see Trölladyngja (Reykjanesskagi)

Trolladyngja
height	1468  m
location	eastern north country , Iceland
Coordinates	64 ° 53 '35 "  N , 17 ° 15' 17"  W Coordinates: 64 ° 53 '35 "  N , 17 ° 15' 17"  W.
Type	Shield volcano

The Trölladyngja ( Isl. Troll Shield Volcano ) is a shield volcano in Iceland's highlands . It is located on the municipal boundary between Þingeyjarsveit and Skútustaðahreppur .

The volcano is located north of Vatnajökull in the Ódáðahraun lava desert, over which it rises about 600 m. The volcano has a diameter of about 10 km, making it the largest shield volcano in Iceland. Its crater is 100 m deep with a length of 1200 m and a width of 500 m. Most of its lava flowed to the north. Part of it flowed 100 km to the northwest to the Bárðardalur valley . The river Skjálfandafljót flows through the valley and falls further north over the Goðafoss .