The desert out here is scattered with mines, copper, gold, etc. We are never quite sure what we are looking at since this really is wilderness and there are no guide maps or informational kiosks to educate us.
However, the beautiful green/turqoise/blue veining in the red rocks here seems to indicate copper ore, or so we are guessing. It is beautiful, and visible for miles.
We also came upon some extremely deep mine shafts, completely in the open. When we threw a rock inside it would take as long as 2+ seconds to find bottom (or a turn in the shaft) so they are very deep! We were warned to be careful of them while exploring.