GMHR Fact Sheet Zones Eastern KY

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Producing zones in eastern Kentucky

PENNSYLVANIAN Lee Formation (Salt Sand) 

MISSISSIPPIAN Pennington Formation (Maxon, Ravencliff) 
              Newman Limestone (Big Lime) 
              Borden Formation (Injun, Keener, Weir) 
              Berea Sandstone (Grit) 

DEVONIAN      Ohio Shale 
              Onondaga, Huntersville Limestone (Corniferous) 

SILURIAN      Salina Dolomite (Corniferous) 
              Lockport Dolomite (Corniferous) 
              Keefer Sandstone (Big Six) 
              Clinch Sandstone (Clinton sand) 

ORDOVICIAN    Lexington Limestone (Trenton) 
              High Bridge Group (Stones River, Murfreesboro) 
              St. Peter Sandstone 
              Knox Group, Beekmantown Dolomite 

CAMBRIAN      Knox Group, Copper Ridge Dolomite 
              Rome Formation