Gunflint Range

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title: "Gunflint Range" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["geology-of-minnesota", "geology-of-ontario", "iron-ore-deposits"] description: "Iron ore deposit in Minnesota, United States and Ontario, Canada" topic_path: "science/earth-science" source: "https://en.wikipedia.org/wiki/Gunflint_Range" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Iron ore deposit in Minnesota, United States and Ontario, Canada ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/0/0d/Iron_Ranges.jpg" caption="Lake Superior [[Iron Range]]s"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/c/c7/Duluthcomplexmap.png" caption="Mesabi]] and Gunflint Ranges"] ::

The Gunflint Range is an iron ore deposit in northern Minnesota in the United States and Northwestern Ontario, Canada. The range extends from the extreme northern portion of Cook County, Minnesota into the Thunder Bay District, Ontario.

The Gunflint Iron Formation is a continuation of the Mesabi Range to the southwest. The two have been separated by the intrusion of the Duluth Gabbro complex.{{cite book | last = Ojakangas | first = Richard W. |author2=Matsch, Charles L. | title = Minnesota's Geology | publisher = University of Minnesota Press | year = 1982 | location = Minneapolis | isbn = 0-8166-0953-5 | pages = 35–36, 39, 55–57

The cherts of the Gunflint (the Gunflint Chert) are noted for containing Precambrian microfossils.

References

References

1. Mel'nik, Y. P. and D. B. Vitaliano ''Precambrian Banded Iron-formations: Physicochemical Conditions of Formation,'' Elsevier, 1982, p. 14 {{ISBN. 978-0-444-41934-7
2. [https://web.archive.org/web/20160306101916/https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=MNPReif%3B0 ''Animikie Group; Iron-formation''], Minnesota geologic map data, USGS
3. [https://web.archive.org/web/20170117110559/http://www.d.umn.edu/prc/workshops/Guidebooks/BIF%20Guidebook4.pdf Geology of the Gunflint Iron Formation and the Sudbury Impact Layer, Northeastern Minnesota]

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