North Shore Volcanic Group; Schroeder-Lutsen basalts (MNPRmnp;0)

North Shore Volcanic Group; Schroeder-Lutsen basalts - Predominantly ophitic olivine tholeiitic basalt unconformably over older, normally polarized volcanic rocks. Based on its stratigraphic position and geochemical affinities, the unit may be correlative with the Lake Shore traps of northern Michigan

State	Minnesota
Name	North Shore Volcanic Group; Schroeder-Lutsen basalts
Geologic age	Middle Proterozoic
Original map label	Pmnp
Primary rock type	basalt
Secondary rock type
Other rock types
Lithologic constituents	Major Igneous > Volcanic > Mafic-volcanic > Basalt
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 - Lake