Morenci is Arizona's longest and biggest producer of copper ore. It has been worked almost continuously since 1872. Morenci is the site of many innovations in copper extractions. In 2017, 737 million pounds of copper were extracted at Morenci. For a detailed mining history of Morenci, see David Briggs' "History of the Copper Mountain (Morenci) Mining District, Greenlee County, Arizona". https://library.azgs.arizona.edu/item/AGCR-1552428401381-769
Photographer: David Briggs
Photo Date: circa 2012