|Name||Undifferentiated (Ordovician rocks)|
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
|Comments||Undifferentiated Ordovician Rocks-Predominantly dolomite and limestones and some important sandstone and shale units. Ordovician age rocks are exposed over approximately one-third of the state. The Canadian, Champlainian, and Cincinnatian Series all represented. The Canadian, Champlainian Series being the most extensive.|
Howe, W.B. and Koenig, 1961, The Stratigraphic Succession in Missouri: Missouri Geological Survey and Water Resources, Vol XL. 2nd Series.
|Counties||Bollinger - Callaway - Franklin - Montgomery - Saint Charles - Saline - Warren|