Mille Lacs Group and related rocks of the Penokean fold-and-thrust belt; Metabasalt, metadiabase, and metasedimentary rocks metamorphosed to lower amphibolite facies (MNPRevd;0)

State	Minnesota
Name	Mille Lacs Group and related rocks of the Penokean fold-and-thrust belt; Metabasalt, metadiabase, and metasedimentary rocks metamorphosed to lower amphibolite facies
Geologic age	Early Proterozoic
Original map label	Pevd
Primary rock type	metavolcanic rock
Secondary rock type	diabase
Other rock types	metasedimentary rock; argillite; iron formation
Lithologic constituents	Major Metamorphic > Metaigneous > Metavolcanic > Metabasaltmetabasalt; includes fragmental volcanic rocks Minor Metamorphic > Metaigneous > Metaintrusive > Metadiabasemetadiabse Metamorphic > Metasedimentary Incidental Sedimentary > Chemical > Banded-iron-formationoxide iron-formation Metamorphic > Metasedimentary > Metaclastic > Argillitegraphic argillte Igneous > Hypabyssal > Mafic-hypabyssalmafic hypabyssal intrusions
Map references	Morey, G.B., and Meints, Joyce, 2000, Geologic map of Minnesota - Bedrock Geology: Minnesota Geological Survey, State Map Series, S-20, 3rd edition, scale 1:1,000,000. available online at: http://www.geo.umn.edu/mgs/currentpubs.htm [http://www.geo.umn.edu/mgs/currentpubs.htm]
Unit references	Morey, G.B., and Meints, Joyce, 2000, Geologic map of Minnesota - Bedrock Geology: Minnesota Geological Survey, State Map Series, S-20, 3rd edition, scale 1:1,000,000. available online at: http://www.geo.umn.edu/mgs/currentpubs.htm [http://www.geo.umn.edu/mgs/currentpubs.htm]
Geographic coverage	Aitkin - Carlton - Crow Wing - Kandiyohi - Meeker - Morrison - Stearns