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National Geologic Map Database

Geologic Unit: Knox

Usage:

Knox Dolomite (AL*,KY*,TN*, and subsurface of IN,MS,OH*)
Knox Group (AL,GA*,IL*,KY*,TN*,VA*,WV)
Knox Supergroup (IN-subsurface)


Subunits:

FORMATION STATUS: Rose Run Sandstone Member (OH*).

GROUP STATUS (alphabetical): Beekmantown Formation (VA) or Beekmantown Dolomite (KY*,VA*,WV), Bonneterre Formation (IL), Chepultepec Dolomite (AL,GA*,KY*,TN*,VA*) or Chepultepec Formation (TN,VA), Conococheague Limestone (TN*) or Conococheague Formation (VA*), Copper Ridge Dolomite (AL*,GA*,KY*,TN*,VA*) or Copper Ridge Formation (VA), Davis Formation (IL), /Derby-Doerun Dolomite (IL), Eau Claire Formation (IL), Eminence Dolomite (IL*) or Eminence Formation (IL*), Everton Dolomite (IL*), Franconia Formation (IL), Galesville Sandstone (IL), Gunter Sandstone (IL), Ironton Sandstone (IL), Jonesboro Limestone (TN*,VA), Kingsport Formation (TN*) or Kingsport Limestone (TN*) or Kingsport Dolomite (TN*,VA*), Longview Dolomite (KY,TN) or Longview Formation (VA) or Longview Limestone (AL,GA), Mascot Dolomite (TN*,VA*) or Mascot Formation (TN,VA), New Richmond Sandstone (IL), Newala Dolomite (AL,KY*,VA*) or Newala Formation (GA,KY*) or Newala Limestone (AL,GA*,KY*), Odenville Limestone (AL), Oneota Dolomite (IL*,KY*), Potosi Dolomite (IL*,KY*), Rose Run Sandstone (KY*), Shakopee Dolomite (IL*).

SUPERGROUP STATUS (alphabetical) --all in IN: Everton Dolomite, Potosi Dolomite, Prairie du Chien Group.


Geologic age:

Late Cambrian to Early Ordovician*
(age of Knox Supergroup is Late Cambrian to Middle Ordovician)


Type section, locality, area and/or origin of name:

Type area: Knox Co., TN (Safford, 1869).


AAPG geologic province:

Appalachian basin*
Black Warrior basin*
Illinois basin*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).