The route up Keystone Canyon passes an old mine. There are many very thin coatings of copper carbonates and silicates, coloring some rocks bright green or blue. However, it is likely the ore was in the duller copper oxides at upper left, or in the ZnS-CuFeS2-sulfate like the sample at lower left.
Page Scores range from 0% to 100%. The higher the score, the higher the perceived quality of the image. Score is not a simple average of votes, but takes into account the number of votes and the power of the voters.
For every object, a hit is registered each time the object's main page is viewed. A user's hits are the sum of all the hits on the objects he or she owns.