WSUGPH2200OreCopperPPT.ppt - *Ch 12 Copper Mining Hot...

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*Ch. 12 Copper Mining
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Hot waters pushed copper and other mineral through rifts in the ground. *Discovered in the 1840’s…by 1880, the Kewanaw Penninsula produced 80% of US copper. Reached its peak in 1918 *Over 30 countries…lots of immigration *Average thickness of vein of copper is 15 meters
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*Could not be blasted …needed to cut by hand *Glaciers stripped away soils so some were exposed to the surface About 7000 years ago, humans first exploited copper at Kewenaw
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*Alloyed with tin to make bronze *Alloyed with zinc to make brass *Good conductor of heat so it was used with wires etc. Many professionals also came as accountants, doctors, engineers etc. as the population grew *At times, 90% of nations copper came from here
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*Immigrants came from Finland, Italy, Eastern Europe…treated with very little respect…work was hard and unsafe *Houghton, Hancock, and Calumet became very modern with paved streets, streetcars.
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  • Fall '18
  • Dennis Burin
  • Iron ore, Iron Mining

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