Devils Tower
by American Philosophical Society
Title
Devils Tower
Artist
American Philosophical Society
Medium
Photograph - Photograph
Description
Aerial photograph of Devils Tower, a basalt outcrop in Wyoming, USA. This massive rocky tower rises almost 300 metres above the plain. It was formed by the cooling of a plug of underground magma (molten rock) produced by a volcano around 60 million years ago. Erosion of the softer surrounding soil and rock over the centuries slowly exposed the hard rock, causing it to project above the surface. This image was taken during the National Geographic Society-US Army Air Corps stratosphere flight in the balloon 'Explorer II' in November 1935.
Uploaded
July 25th, 2016
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