About a billion years ago, huge volumes of lava covered northern Michigan. About 200 years ago, those lava flows gave rise to the first major, mechanized copper mine in North America. This is the story of the Greenstone Flow and the Cliff Mine in Michigan's Keweenaw Peninsula.

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The thankyou section:
Special thanks to Dr. Laurel Woodruff (USGS) and Dr. Sean Gohman (Keweenaw National Historical Park Advisory Commission) for their review of this script and insight into the Greenstone Flow and the Cliff Mine.

Special thanks as well to Amanda Makela at 2nd Sandbar Productions for the gorgeous drone footage!

You can read the 1842 Treaty of La Point here, courtesy of the Keweenaw Bay Indian Community: https://www.kbicnsn.gov/index.php/go...

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#geology #upperpeninsula #history

Correction:
11:50 I dropped a word here. The Cliff has been considered the first major /copper/ mine in North America.