description Gerðuberg Cliffs Overview
Gerðuberg Cliffs are a long wall of basalt columns on the Snæfellsnes Peninsula in western Iceland. The columns formed when lava cooled and contracted, producing the regular polygonal joints that give the cliff its distinctive appearance. Most columns are arranged in a near-continuous row above the surrounding landscape, making Gerðuberg a recognizable geological stop for visitors interested in volcanic rock formations.
help Gerðuberg Cliffs FAQ
Where is Gerðuberg?
Gerðuberg is on the Snæfellsnes Peninsula in western Iceland, near the western edge of Hnappadalur valley. It appears as a long wall of dark basalt columns beside the road through the region.
Why do the columns at Gerðuberg form hexagons?
The columns formed when basaltic lava cooled and contracted, producing regular fractures. Gerðuberg is especially striking because many of the columns are unusually uniform and geometrically well formed.
How tall are the Gerðuberg basalt columns?
Many columns are reported to be roughly 7 to 14 metres tall, although their dimensions vary along the cliff. Their regular arrangement makes the formation look almost like a man-made fortress wall.
Is Gerðuberg made of ordinary cliff rock?
It is a volcanic basalt formation, sometimes described more specifically as coarse-grained dolerite. The visible geometry comes from cooling joints rather than masonry or human construction.
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