Friday, January 27, 2012

Big Boulders

These large boulders were at a rest area in southwest Arizona on I-10. The large rocks starting appearing a few miles before the rest area and strangely they completely stopped within 1/4 mile after reentering I-10.

1 comment:

Cyndi said...

That's the monzogranite of Texas Canyon, formed when a giant bubble of molten rock made its way to the surface of the earth (think lava lamp-type movement). Then the surrounding sediments eroded, leaving the granite to wear away slowly into the formations you saw there. It's the same type of formations as Joshua Tree National Park in southern California, and the Alabama Hills a few hundred miles north near Lone Pine. I love seeing Texas Canyon when we're travelling on the 10, since it reminds me of home here in SoCal.


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