We put three rocks on the ice, two black ones and a white one. After three hours (this picture), the black ones have sunk into the ice by about 1/2 of an inch and the white one almost did not sink in at all. This shows that solar heated rocks can melt the underlying ice and leave vertical tunnels in the ice!
Location
Lake Fryxell
Antarctica
Created by Hubert Staudigel on Monday, 15 November 2010 and updated on Tuesday, 16 November 2010
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