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Map Releases

Our programs produce accurate geologic maps and 3-D geologic frameworks that provide critical data for sustaining and improving the quality of life and economic vitality of the Nation. 

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Bedrock topography of the eastern and central Mesabi Range, northeastern Minnesota

The Mesabi iron-mining district or range, is in north-eastern Minnesota, 60 to 85 miles west of Lake Superior. The Mesabi Range, in this report, includes the iron-mining belt, ¼ of a mile to 3 miles wide, that extends for 120 miles in a northeasterly direction across Itasca and St. Louis Counties. It is the area of economically important iron-bearing formation and associated rocks, now mostly buri

Geologic and aeromagnetic map of northern Maine

No abstract available.