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Lexington Limestone

Lexington Limestone
State Kentucky
Name Lexington Limestone
Geologic age Ordovician
Comments in west-central Kentucky, the thickness is 60-110 m; in north-central Kentucky the thickness is 15-60+ m; in northeastern Kentucky, the thickness is at least 45+ m; in east-central Kentucky, the thickness is 55-95 m; Middle Ordovician age
Primary rock type limestone
Secondary rock type shale
Other rock types
Lithologic constituents
Major
Sedimentary > Carbonate > Limestonelithologies and lithology percentages estimated from stratigraphic column on paper source map; collectively these units are about 90% limestone (some nodular, some clastic) and 10% shale
Minor
Sedimentary > Clastic > Mudstone > Shalelithologies and lithology percentages estimated from stratigraphic column on paper source map; collectively these units are about 90% limestone (some nodular, some clastic) and 10% shale
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.
USGS Geologic Names Lexicon (GEOLEX)
Counties Anderson - Bourbon - Boyle - Clark - Fayette - Franklin - Garrard - Grant - Henry - Jessamine - Lincoln - Madison - Mercer - Owen - Scott - Washington - Woodford