The NS-axis of Iceland at 16° 40’W

Öræfajökull Volcano can be said to be a corner-stone of the convection rolls system, as manifested in Iceland, due to its role as the keypoint for two different direct axis through Iceland. The North Volcanic Zone of Iceland trends directly northwards, and a sharp line can be drawn through the polygons appearing within the pattern formed by division lines of convection rolls of four different mantle layers.

The NS-axis of East Iceland

Various other volcanic and geothermal sites belong to the North Volcanic Zone, but here those happening to be located almost accurately on the NS-line are pointed out. The reason for this is highly mechanical, as the polygons tend to break up from one corner to the other when subject to horizontal pressure due to tectonic drift.

Öræfajökull and Kverkfjöll resemble each other, being placed at the edges of Vatnajökull Glacier. Askja and Hrúthálsar are similarly located centrally in the polygons. Krafla is located within a rather complicated hub of division lines, and the Öxarfjörður Geothermal Area is found at crossings at the seaside. it has long been a debate whether it is high temperature or low temperature area.

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