Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided (KYOaf;0)

State	Kentucky
Name	Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided
Geologic age	Ordovician
Original map label	Oaf
Comments	in west-central Kentucky, collectively the thickness ranges from 65-225 m; in north-central Kentucky, collectively the thickness ranges from 21-45 m; in northeastern Kentucky, collectively the thickness ranges from 45-75 m; and in east-central Kentucky, collectively the thickness ranges from 30-90 m
Primary rock type	limestone
Secondary rock type	shale
Other rock types	siltstone
Lithologic constituents	Major Sedimentary > Carbonate > Limestonelithologies and lithology percentages estimated from stratigraphic column on paper source map; collectively these units are about 85% limestone (much of it nodular), 10% shale, and <5% siltstone Minor Sedimentary > Clastic > Mudstone > Shalelithologies and lithology percentages estimated from stratigraphic column on paper source map; collectively these units are about 85% limestone (much of it nodular), 10% shale, and <5% siltstone Incidental Sedimentary > Clastic > Siltstonelithologies and lithology percentages estimated from stratigraphic column on paper source map; collectively these units are about 85% limestone (much of it nodular), 10% shale, and <5% siltstone
Map 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.
Unit 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.
Geographic coverage	Bath - Boone - Bourbon - Boyle - Bracken - Bullitt - Campbell - Carroll - Casey - Clark - Fleming - Franklin - Gallatin - Garrard - Grant - Henry - Jefferson - Jessamine - Kenton - Lewis - Lincoln - Madison - Marion - Mason - Montgomery - Nelson - Nicholas - Owen - Pendleton - Robertson - Shelby - Spencer - Trimble - Washington