Fissure eruptions while making dramatic fireshows 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 5560 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