Greenhorn Limestone and Graneros Shale

Greenhorn FM- thin bedded gray, chalky limestone and calcareous shale. Graneros Shale- fissile, noncalcareous, gray shale locally contains sandstone and siltstone beds.
State Kansas
Name Greenhorn Limestone and Graneros Shale
Geologic age Late Cretaceous
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Calcareous)
Minor
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Comments Greenhorn FM- approximate thickness 100 ft. in outcrop. Graneros Shale- approximate thickness 50 ft. in outcrop.
References

Ross, Jorgina A., 1991, Geologic Map of Kansas: Kansas Geological Survey, Univ. of Kansas, Map M-23, scale 1:500,000.

Zeller, D.E., ed., 1968, The Stratigraphic Succession in Kansas, State Geological Survey of Kansas Bull. 189.

NGMDB product
Counties Barton - Cloud - Edwards - Ellis - Ellsworth - Ford - Gray - Hamilton - Hodgeman - Jewell - Kearny - Lincoln - Mitchell - Ness - Osborne - Ottawa - Pawnee - Republic - Rush - Russell - Washington