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Interlayered volcanic, volcaniclastic, sedimentary, and hypabyssal intrusive rocks

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Interlayered volcanic, volcaniclastic, sedimentary, and hypabyssal intrusive rocks. Includes parts of the Mille Lacs Group, North and South Range Groups, and Glen Township Formation.
State Minnesota
Name Interlayered volcanic, volcaniclastic, sedimentary, and hypabyssal intrusive rocks
Geologic age Paleoproterozoic
Lithologic constituents
Major
Igneous > Volcanic (Volcaniclastic)
Sedimentary (Bed)
Igneous > Hypabyssal
Comments Part of the Mille Lacs and North Range Groups in the fold-and-thrust belt of the Penokean orogen (twice-deformed). Twice-deformed metasedimentary rocks at the apparent base of the Animikie basin. Part of the Geon 18 intrusions and supracrustal rocks (syn- to late Penokean orogenesis).
References

Jirsa, Mark A., Boerboom, Terrence J., Chandler, Val W., Mossler, John H., Runkel, Anthony C., and Setterholm, Dale R., 2011, S-21 Geologic Map of Minnesota-Bedrock Geology; Minnesota Geological Survey, State Map Series S-21. Scale 1:500,000.
NGMDB product
Counties Aitkin - Carlton - Crow Wing - Kanabec - Kandiyohi - McLeod - Meeker - Mille Lacs - Pope - Sherburne - Stearns - Wright