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Updated: May 18, 2025
I have already quoted Olafsen's observations on the polygonal lining which he saw on the surface of the ice in the Surtshellir.
E.T. Holland visited the Surtshellir in the course of his tour in Iceland, in 1861, and an account of his visit is given in the first volume of 'Peaks, Passes, and Glaciers. After following in Olafsen's steps for some time, the party reached a cave whose floor was composed of very clear ice, apparently of great thickness, for they could not see the lava beneath it.
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