This spoon-shaped volcanic system is one of the most active and productive in the country. It is about 90 km long and 5–30 km wide. The central volcano of Katla is a broad mountain massif with a large caldera and possibly a secondary active centre in the west, at Goðabunga. The Mýrdalsjökull ice cap largely covers the central volcano and caldera, apart from a few small peaks on ...