Banded iron formation
This banded rock at the Soudan Mine shows layers of iron formation. Deposited at the bottom of the sea some 2.7 billion years ago, they were folded by the movements of continental plates.
Photo courtesy of Mark Jirsa, Minnesota Geological Survey
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Layered rocks near Chisolm
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That is the best picture I have ever seen of movement by continental plates!
I really like this pictureit is so cool
We visited Soudan Mine and saw this formation. Both were very cool, as was the Hull Rust Mine in Hibbing, Confusion Hill (Laurentian Divide, Giants Ridge Batholith) and the pillowed Greenstone behind the high school in Gilbert, MN. The batholith and greenstone may mark the edges of a Hadean-era microplate.
Buy the books Minnesota Geology and Earth to learn more about these processes and how they occured locally. Information about the social, political, and economic impacts of Minnesota's mines is also very interesting.
thats awesome
I never Minnesota was so unique!
THIS IS ONE OF THE SICKEST THINGS I HAVE EVER SEEN I AM SO STOKED TO GO A FIND THIS PLACE ONE DAY!
This is really cool looks alot like ice cream yummmm!
Very weird!
it looks like water. I love it
The flat rock looks like a shell.
Its pretty cool!
this is so cool i wish i had a rock like it
this is a cool image of rock
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