Ordovician rocks, undifferentiated (INO;0)

State	Indiana
Name	Ordovician rocks, undifferentiated
Geologic age	Silurian
Original map label	O
Primary rock type	shale
Secondary rock type	limestone
Other rock types	dolostone (dolomite)
Lithologic constituents	Major Sedimentary > Carbonate > LimestoneOrdovician rocks, undifferentiated Shale and limestone; upper part of Maquoketa Group in deep buried valleys; Maquoketa to upper part of Knox Supergroup in Kentland area Sedimentary > Clastic > Mudstone > Shale Minor Sedimentary > Carbonate > DolostoneOrdovician rocks, undifferentiated Shale and limestone; upper part of Maquoketa Group in deep buried valleys; Maquoketa to upper part of Knox Supergroup in Kentland area
Map references	Gray, Henry H., Ault, Curtis, H., and Keller, Stanley, J., 1987, Bedrock geologic map of Indiana: Dept. of Natural Resources, Indiana Geological Survey, Miscellaneous Map 48, scale = 1:500,000
Unit references	Gray, Henry H., Ault, Curtis, H., and Keller, Stanley, J., 1987, Bedrock geologic map of Indiana: Dept. of Natural Resources, Indiana Geological Survey, Miscellaneous Map 48, scale = 1:500,000
Geographic coverage	Adams - Blackford - Delaware - Grant - Henry - Jay - Madison - Newton - Randolph - Wabash