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Green volcanic ash rock at Simpson Springs, Utah, USA
Utah

Walk 100 yards from the campground at Simpson Springs or 20 yards past the ruins of the CCC World War II camp and you'll come upon an outcrop of brilliant light green rock.  There are smaller patches near the Pony Express cabin, but the outcrop is much more expansive here.  From boulder size to sand, the green rock spills down the hill.

The rock is actually a form of volcanic ash, fused solid either under its own weight when it fell or simply the heat of the eruption.  I haven't been able to find out what lends it the green color, but it's definitely an unusual sight!

Copyright: John Roberts
Type: Spherical
Resolution: 20000x10000
Uploaded: 28/03/2014
Updated: 04/04/2014
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Tags: geology; desert; public lands; outdoors; outdoor recreation; hiking
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More About Utah

Utah is a state located in the westcentral region of the United States of America.  Utah is the 13th largest state by area, ranks 34th by population and 10th by population density of the 50 United States.  Utah was the 45th state to be admitted into the Union, on January 4, 1896. Utah is landlocked, being bordered by the states of Idaho to the north, Wyoming to the northeast, Nevada on the west, Colorado on the east and Arizona to the south.  Utah is very mountainous and is a popular outing destination of the outdoorsman.  The state population is about 2.82M with 95% being Caucasian, 2.4% Asian, 1.7% Native American and 1.3% Black. The state capital and largest city is Salt Lake City.Source: wikipedia