| State | Missouri |
|---|---|
| Name | Decorah Group, Plattin Group |
| Geologic age | Middle Ordovician-Mohawkian Series |
| Lithologic constituents |
Major
Sedimentary > Carbonate > Limestone (Bed)
Minor
Sedimentary > Clastic > Mudstone > Shale (Bed)
|
| Comments | IN SOUTHEAST and NORTHEAST MO-Decorah Group- (40 ft. max) shale with thin limestone beds; Plattin Group- (450 ft. max) finely crystalline limestone with minor interbedded shale |
| Stratigraphic units | PLATTIN GROUP- including Bloomsdale FM, Beckett FM, Hager FM, Macy FM. |
| References | Howe, W.B. and Koenig, 1961, The Stratigraphic Succession in Missouri: Missouri Geological Survey and Water Resources, Vol XL. 2nd Series. |
| NGMDB product | |
| Counties | Cape Girardeau - Franklin - Jefferson - Lincoln - Perry - Pike - Ralls - Sainte Genevieve - Saint Louis - Scott |