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Banded iron-formation and associated volcanogenic rocks

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Magnetite-quartz iron-formation and associated talc schist in aluminous quartzofeldspathic schist (unit Wt)
State Wisconsin
Name Banded iron-formation and associated volcanogenic rocks
Geologic age Late Archean
Lithologic constituents
Major
Sedimentary > Chemical > Banded-iron-formation
Minor
Metamorphic > Schisttalc schist
Comments Marshfield terrane
References

Sims, P.K., 1992, Geologic map of Precambrian rocks, southern Lake Superior region, Wisconsin and northern Michigan: U.S. Geological Survey Miscellaneous Investigations Map I-2185, scale 1:500,000.

https://pubs.er.usgs.gov/publication/i2185
NGMDB product
Counties Jackson