![Morenci Copper Mine, Arizona](https://www.nasa.gov/wp-content/uploads/2023/03/208281main_morenci.jpg)
Morenci Copper Mine, Arizona
Looking more like an alien landscape than an Earthly landscape, the Morenci open-pit copper mine in southeast Arizona is North America's leading producer of copper. In the 1860s, prospectors arrived looking for gold; instead they found copper. Underground mining began in the 1870s, and the first pit was opened in 1939.
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