Gerðuberg was formed from flowing basaltic lava, cooled by the sea, solidified in very evenly running columns. These are between 1 and 1.5 m wide and 7 to 14 m high.[2]
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^"Klifur.is - Gerðuberg". Archived from the original on 2014-02-01. Retrieved 2012-09-05.{{cite web}}: CS1 maint: bot: original URL status unknown (link)