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en.wikipedia.org/wiki/Copper_mining_in_the_United_States

Copper mining in the United States has been a major industry since the rise of the northern .... Russian explorers discovered copper on the Kasaan Peninsula of Prince of Wales Island in southeastern Alaska about 1865. Mining began in the ...

www.copper.org/education/Kids/copperandkids_wheredoescopper.html

Copper is found in many parts of the world. It usually comes from copper ore, but small amounts are occasionally found ("native copper") in distorted cubic crystal ...

scienceviews.com/geology/copper.html

Although native copper is somewhat rare, large amounts are found by the Great Lakes and was mined by ancient American cultures. Copper is usually found in ...

resources.schoolscience.co.uk/CDA/11-14/chemistry/copch32pg1.html

Copper is an unreactive metal - it reacts only slowly with the atmosphere. This means that huge lumps of copper metal are found buried in the ground as nuggets ...

www.farmerscopper.com/blog/where-does-copper-come-from

Copper is found in many parts of the world. It usually comes from copper ore, but small amounts are occasionally found (“native copper”) in distorted cubic crystal ...

www.minerals.net/mineral/copper.aspx

Copper may have impurities, but is commonly in a fairly pure state. Native copper is found only in small quantities throughout the world, but there are a few areas ...

mineralseducationcoalition.org/elements/copper

... origins of its name unknown. Copper is one of the first metals to be used, largely because it occurs in metallic form at the surface. ... Year Discovered. Antiquity ...

www.reference.com/science/copper-found-earth-28834aba02650ec6

Copper, the oldest metal known to human beings, is found in ore deposits throughout the world, with the largest production occurring in Chile and the United ...

www.mining-technology.com/features/feature-the-10-biggest-copper-mines-in-the-world

Nov 5, 2013 ... Chile, the world's largest copper producing country, hosts six of the 10 ... The copper deposit was discovered in 1920 and mining operations ...

www.desertusa.com/rocks-minerals/copper.html

Copper found in the free metallic state in nature is called "native copper." It is found throughout the world as a primary mineral in basaltic lavas. The greatest ...