Little Falls Formation

Schist and slate of graywacke-mudstone protolith.
State Minnesota
Name Little Falls Formation
Geologic age Paleoproterozoic
Lithologic constituents
Metamorphic > Schistof graywacke-mudstone protolith
Metamorphic > Metasedimentary > Metaclastic > Slateof graywacke-mudstone protolith
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).

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 - Benton - Carlton - Crow Wing - Kandiyohi - McLeod - Meeker - Mille Lacs - Morrison - Pine - Renville - Stearns - Todd