Drakes, Whitewater and Liberty Formations, Undivided

Drakes Formation; shale (90%) and limestone/dolomite (10%), interbedded; gray and maroon, weathers yellowish gray; planar to irregular, thin to thick bedded; 20 to 30 feet thick. Whitewater Formation, limestone (60%) and shale (40%) interbedded; gray weathers yellowish gray; irregular to wavy, thin to medium bedded; 20 to 80 feet thick. Liberty Formation, limestone (50%) and shale (50%), interbedded; gray weathers yellowish gray; planar to irregular, thin to medium bedded; 20 to 40 feet thick. Interval ranges from 60 to 150 feet in thickness. The Geological Survey of Ohio recognizes the Cincinnati Group proposed by Meek and Worthen (1865), but at this time retains it as an informal term. The unit will be formally reinstated as a lithostratigraphic term after revision of its lower boundary and minor lithologic redescription of its units are completed. The ten formations included in the group are the (ascending) Clays Ferry Formation, the Kope Formation, the Fairview Formation, the Miamitown Shale, the Grant Lake Limestone, the Arnheim Formation, the Waynesville Formation, the Liberty Formation, the Whitewater Formation, and the Drakes Formation. Six members have been identified in the course of field mapping: the Point Pleasant Tongue of the Clays Ferry, the informal Bellevue, Corryville, Mount Auburn, and Straight Creek members of the Grant Lake Limestone, and the Preachersville Member of the Drakes Formation. The Backbone Creek and Elk Creek beds are recognized as excellent stratigraphic marker beds (Shrake and others, 1988).
State Ohio
Name Drakes, Whitewater and Liberty Formations, Undivided
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)Drakes: shale(90%) and limestone/dolomite(10%), interbedded; gray and maroon,weathers yellowish gray; planar to irregular, thin to thick bedded; 20 to 30 feet thick. Whitewater: limestone(60%) and shale(40%) interbedded; gray weathers yellowish gray; irregular to wavy, thin to medium bedded; 20 to 80 feet thick. Liberty: limestone(50%) and shale(50%), interbedded; gray weathers yellowish gray; planar to irregular, thin to medium bedded; 20 to 40 feet thick.
Sedimentary > Clastic > Mudstone > Shale (Bed)Drakes: shale(90%) and limestone/dolomite(10%), interbedded; gray and maroon,weathers yellowish gray; planar to irregular, thin to thick bedded; 20 to 30 feet thick. Whitewater: limestone(60%) and shale(40%) interbedded; gray weathers yellowish gray; irregular to wavy, thin to medium bedded; 20 to 80 feet thick. Liberty: limestone(50%) and shale(50%), interbedded; gray weathers yellowish gray; planar to irregular, thin to medium bedded; 20 to 40 feet thick.
Incidental
Sedimentary > Carbonate > Dolostone (Bed)Drakes: shale(90%) and limestone/dolomite(10%), interbedded; gray and maroon,weathers yellowish gray; planar to irregular, thin to thick bedded; 20 to 30 feet thick. Whitewater: limestone(60%) and shale(40%) interbedded; gray weathers yellowish gray; irregular to wavy, thin to medium bedded; 20 to 80 feet thick. Liberty: limestone(50%) and shale(50%), interbedded; gray weathers yellowish gray; planar to irregular, thin to medium bedded; 20 to 40 feet thick.
Comments Secondary unit description from USGS Lexicon website (ref. OH017) and OH011: The Geological Survey of Ohio recognizes the Cincinnati Group proposed by Meek and Worthen (1865), but at this time retains it as an informal term. The unit will be formally reinstated as a lithostratigraphic term after revision of its lower boundary and minor lithologic redescription of its units are completed. The ten formations included in the group are the (ascending) Clays Ferry Formation, the Kope Formation, the Fairview Formation, the Miamitown Shale, the Grant Lake Limestone, the Arnheim Formation, the Waynesville Formation, the Liberty Formation, the Whitewater Formation, and the Drakes Formation. Six members have been identified in the course of field mapping: the Point Pleasant Tongue of the Clays Ferry, the informal Bellevue, Corryville, Mount Auburn, and Straight Creek members of the Grant Lake Limestone, and the Preachersville Member of the Drakes Formation. The Backbone Creek and Elk Creek beds are recognized as excellent stratigraphic marker beds (Shrake and others, 1988).
References

Slucher, E.R., (principal compiler), Swinford, E.M., Larsen, G.E., and others, with GIS production and cartography by Powers, D.M., 2006, Bedrock geologic map of Ohio: Ohio Division of Geological Survey Map BG-1, version 6.0, scale 1:500,000.

Frey, R.C., 1995, Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati arch region of Kentucky, Indiana, and Ohio, IN Pojeta, John, Jr., ed., Contributions to the Ordovician paleontology of Kentucky and nearby states: U.S. Geological Survey Professional Paper, 1066-P, p. P1-P126.

https://pubs.er.usgs.gov/publication/pp1066P

Shrake, D.L., Schumacher, G.A. and Swinford, E.M., 1988, Field guidebook to the stratigraphy, sedimentology, and paleontology of the Upper Ordovician Cincinnati Group of southwest Ohio: Ohio Division of Geological Survey, Society of Economic Paleontologists and Mineralogists, 5th Midyear Meeting, 81 p.

USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/

https://ngmdb.usgs.gov/Geolex/search

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