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Cherokee Group

Cyclic deposits with carbonaceous shale, clay, siltstone, with lesser sandstone, and thick coal beds; minor but persistent limestone beds; may include parts of Atoka or Morrow Series.
State Iowa
Name Cherokee Group
Geologic age Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Des Moines]
Comments Approx. thickness 775 ft.
Primary rock type shale
Secondary rock type claystone
Other rock types siltstone; sandstone; coal; limestone
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Mudstone > Claystone (Bed)
Sedimentary > Clastic > Siltstone (Bed)
Minor
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Coal (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Map references
Hershey H. G. 1969, Geologic Map of Iowa: Iowa Geological Survey, scale 1:500K
Unit references
Hershey H. G. 1969, Geologic Map of Iowa: Iowa Geological Survey, scale 1:500K
Counties Appanoose - Audubon - Benton - Boone - Calhoun - Carroll - Cedar - Clarke - Clinton - Crawford - Dallas - Davis - Decatur - Des Moines - Franklin - Greene - Grundy - Guthrie - Hamilton - Hardin - Henry - Humboldt - Iowa - Jackson - Jasper - Jefferson - Johnson - Jones - Keokuk - Lee - Linn - Louisa - Lucas - Mahaska - Marion - Marshall - Monroe - Muscatine - Polk - Poweshiek - Sac - Scott - Shelby - Story - Van Buren - Warren - Washington - Webster - Wright