Logan Intrusions (MNPRml;0)

State	Minnesota
Name	Logan Intrusions
Geologic age	Middle Proterozoic
Original map label	Pml
Primary rock type	diabase
Secondary rock type	gabbro
Other rock types	felsic volcanic rock
Lithologic constituents	Major Igneous > Plutonic > Gabbroic > Gabbro Igneous > Volcanic > Mafic-volcanic > Basalt (Diabase) Minor Igneous > Volcanic > Felsic-volcanic (Dike or sill)felsic dikes and sills
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	Cook