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Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided

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Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided; in Boyle, Casey, and Marion Counties
State Kentucky
Name Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestonelithologies and lithology percentages estimated from stratigraphic column on paper source map; collectively these units are about 55% limestone, 30% dolostone (dolomite) ( some of it nodular), and 15% interbedded shale
Minor
Sedimentary > Clastic > Mudstone > Shalelithologies and lithology percentages estimated from stratigraphic column on paper source map; collectively these units are about 55% limestone, 30% dolostone (dolomite) ( some of it nodular), and 15% interbedded shale
Sedimentary > Carbonate > Dolostonelithologies and lithology percentages estimated from stratigraphic column on paper source map; collectively these units are about 55% limestone, 30% dolostone (dolomite) ( some of it nodular), and 15% interbedded shale
Comments collectively, in west-central Kentucky, these units range from 30-137 m thick
References

Noger, M.C., compiler, 1988, Geologic map of Kentucky: sesquicenntennial edition of the Kentucky Geological Survey: U.S. Geological Survey and the Kentucky Geological Survey, scale 1:500,000.
NGMDB product
Counties Boyle - Casey - Marion - Taylor