Skip to main content

Ordovician rocks, undifferentiated

Ordovician rocks, undifferentiated - Shale and limestone; upper part of Maquoketa Group in deep buried valleys; Maquoketa to upper part of Knox Supergroup in Kentland area
State Indiana
Name Ordovician rocks, undifferentiated
Geologic age Silurian
Primary rock type shale
Secondary rock type limestone
Other rock types dolostone (dolomite)
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale
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
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
Counties Adams - Blackford - Grant - Jay - Madison - Newton - Randolph - Wabash