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Middle Ordovician rocks, undivided

Middle Ordovician rocks, undivided - Decorah Shale; limestone of the Platteville Formation; shaly rocks of the Glenwood Formation; and St. Peter Sandstone in the Hollandale embayment of southeastern Minnesota
StateMinnesota
NameMiddle Ordovician rocks, undivided
Geologic ageMiddle Ordovician
Original map labelOm
Primary rock typesandstone
Secondary rock typelimestone
Other rock typesshale
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Minor
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Mudstone > Shale
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
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
Geographic coverageAnoka - Blue Earth - Carver - Chisago - Dakota - Dodge - Faribault - Fillmore - Goodhue - Hennepin - Houston - Le Sueur - Martin - Olmsted - Ramsey - Rice - Scott - Steele - Wabasha - Waseca - Washington - Winona

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