Steven Dutch, Professor Emeritus, Natural and Applied Sciences, University of Wisconsin - Green Bay
Location: 37o 37' 30" N, 119o 05' 05" W.
Devil's Postpile is a small lava flow a few million years old. As the flow cooled, it shrank and broke up into neat columns. This view shows the top of the columns, arranged in a neat honeycomb pattern. The rock has been smoothed off by glaciers, and the lines running away from the picture were made by pebbles trapped in the ice.
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Created 25 November 2005, Last Update 20 January 2020