Interlayered volcanic and sedimentary rocks

Interlayered volcanic and sedimentary rocks.
State Minnesota
Name Interlayered volcanic and sedimentary rocks
Geologic age Paleoproterozoic
Lithologic constituents
Major
Sedimentary (Bed)Interlayered volcanic and sedimentary rocks
Igneous > VolcanicInterlayered volcanic and sedimentary rocks
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 - Morrison