Keilir is a hyaloclastite, pyramid-shaped mountain situated in Reykjanes. The mountain was created during subglacial eruptions throughout the Ice Age and its shape is ver
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Trölladyngja is a hyaloclastite mountain, located in the Ódáðahraun lava field, is the biggest shield volcano in Iceland. With a height of 1,468 metres above sea leve
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