What are the metal compositions of the different colors of rocks in places like the ... the purple ones? Is copper in the green rocks? Boy howdy, this one is a bit more complicated than you ...

The Clifton-Morenci mining district in eastern Arizona is sometimes referred to as the Copper Mountain mining district. But while known mainly for copper deposits, it also produced uncommon minerals.

The Clifton-Morenci District, also called the Copper Mountain District after a prominent green-stained peak, was Arizona’s first major copper-producing region, dating to the 1850s with ...