Graywacke and slate with graphitic and sulfidic zones

Graywacke and slate with graphitic and sulfidic zones.
State Minnesota
Name Graywacke and slate with graphitic and sulfidic zones
Geologic age Paleoproterozoic
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone > Graywacke (Bed)with graphitic and sulfidic zones
Metamorphic > Metasedimentary > Metaclastic > Slatewith graphitic and sulfidic zones
Comments 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