Photo #4

chlorite_zone

A zone of green chlorite breccia less than a meter horizontally from the previous photo shows that alteration occurred discontinuously in space (not just in a zone below and parallel to the detachment fault).
The compositional layering of the mylonitic gneiss is still evident (lower right).
East Saguaro National Park, southern Arizona. View looking NE. Lens cap for scale.

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