Interlayered volcanic and sedimentary rocks

Interlayered volcanic and sedimentary rocks.
State Minnesota
Name Interlayered volcanic and sedimentary rocks
Geologic age Paleoproterozoic
Lithologic constituents
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).

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