The Lavender Open Pit Mine (Lavender pit) at Bisbee, Arizona is a copper, gold and silver mine. Mineralization is low grade disseminated chalcocite with local spots of other copper and zinc sulfides in a blanket deposit in a brecciated intrusive porphyry plug adjoining altered Paleozoic limestones along the Dividend fault. Workings are a huge open pit. Some 75 million tons of ore were produced from 1954 to 1970.
For a brief history of the Warren (Bisbee) Mining District, see Dave Briggs (2015) report: http://repository.azgs.az.gov/uri_gin/azgs/dlio/1648.
For a classic description of the Bisbee Quadrangle, see Ransome (1904), https://ngmdb.usgs.gov/Prodesc/proddesc_4201.htm
(Photo & caption by Michael Collier; Image provided by the AGI Earth Science World Image Bank.)