Forrest Hopson
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Devils Tower phonolite
Devils Tower phonolite porphyry, Devils Tower National Monument, Wyoming. The large white crystals are plagioclase. Nickle for scale. Photograph by R.F. Hopson Copyright. © All rights reserved.
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Uploaded on July 15, 2010
Taken on July 7, 2010
Devils Tower phonolite
Devils Tower phonolite porphyry, Devils Tower National Monument, Wyoming. The large white crystals are plagioclase. Nickle for scale. Photograph by R.F. Hopson Copyright. © All rights reserved.
545
views
0
faves
0
comments
Uploaded on July 15, 2010
Taken on July 7, 2010