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Iceland's Reykjanes volcanism - tectonic setting

Fissure eruptions - while making dramatic fire-shows - threaten to overwhelm the town of Grindavik, on Iceland's Reykjanes peninsula. They testify to active splitting apart of the crust - part of a process that has opened the Atlantic ocean over the past 55-60 million years. Find out a about the tectonics, how tectonics makes the magma that erupts and how Icaland, and the World lives with these volcanoes. Part of The Shear Zone Channel. #tectonics #Iceland #volcanoes #geohazards #geology