Copper Canyon Turtleback fault, view to the northwest.
The Copper Canyon Turtleback is one of three so-called "turtlebacks" in the Black Mountains, named because their curving shapes resemble the backs of turtles. They consist of a core of ductiley deformed metamorphic basement rock (the greenish rock in the foreground), and "upper plate" of brittley faulted sedimentary or volcanic rock (reddish rock in the middleground), and a low-angle normal fault between them.
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