State | Iowa |
---|---|
Name | Marmaton Group |
Geologic age | Middle Pennsylvanian, upper Desmoinesian |
Lithologic constituents |
Major
Sedimentary > Carbonate > Limestone (Bed)fossiliferous
Sedimentary > Clastic > Mudstone > Shale (Bed)shale/mudstone, light to dark gray
Minor
Sedimentary > Clastic > Sandstone (Bed)very fine to medium grained
Sedimentary > Clastic > Mudstone (Bed)green-gray to red/maroon
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)phosphatic
Incidental
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Coal (Bed)
|
References | Witzke, Brian J., Anderson, Raymond R., and Pope, John P., 2010, Iowa Geological and Water Survey, DNR, Bedrock Geologic Map of Iowa, OFM-2010-1. Scale 1:500,000. |
NGMDB product | |
Counties | Adair - Appanoose - Audubon - Boone - Carroll - Cass - Clarke - Crawford - Dallas - Davis - Decatur - Guthrie - Harrison - Lucas - Madison - Marion - Monona - Monroe - Polk - Pottawattamie - Shelby - Warren - Wayne |