There are three volcanic zones that show similarities when compared with the convection sysmtem of mantle underneath, namely Reykjanes, Snæfellsnes and Öræfajökull. They mainly cover two polygons each. The Öræfajökull and Snæfellsnes systems both start at the same latitude, one with Snæfellsjökull, the other with Snæfell. These mountains have the same system position compared with Hekla for instance. But this map is for everyone to ‘read’:
Magic Magma 