Have you ever explored a drill core library? Minnesota’s very own in Hibbing is a treasure trove of earth’s secrets with an astounding three million feet of drill core. Heather Arends from the ...
A library in Hibbing stores not books but hundreds of thousands of rock samples drilled from deep beneath Minnesota, offering a unique resource for researchers and industry. The Minnesota DNR’s Drill ...
Add Yahoo as a preferred source to see more of our stories on Google. Mining exploration companies collect core samples like these ones to determine if an area is rich with mineral deposits. (Jeff ...
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