Usage:
Chattanooga Shale (AL*,AR*,GA*,IN,KS*,KY*,MS,MO*,OH,OK*,TN*,VA*)
Chattanooga Formation (AR,MS,OK)
Subunits:
(alphabetical): Angola Shale Member (VA), Bedford Shale Member (KY), Berea Sandstone Member (KY), Big Stone Gap Member (TN*,VA*), Brallier Member (TN), Cleveland Shale (VA), Cumberland Gap Member (TN,VA), Dowelltown Member (KY,TN*), Gassaway Member (AL*,GA*,KY*,TN*), Hardin Sandstone Member (AL*,TN*), Huron Shale Member (VA), Java Shale Member (VA), Maury Member (GA*), Millboro Member (TN), [?] Misener Member (MO), Noel Member (MO) or Noel Shale Member (AR,OK), Ohio Shale Member (KY), Olentangy Shale Member (KY), /Olinger Gray Shale Member (VA), Rhinestreet Shale Member (KY,VA), Sunbury Shale Member (KY,VA), Sylamore Sandstone Member (AR*,MO,OK*), Three Lick Bed (KY*,VA).
Geologic age:
Middle Devonian (Eifelian) and Late Devonian to Early Mississippian (Frasnian to Kinderhookian)*
Type section, locality, area and/or origin of name:
Type locality: hillside exposure at north end of Cameron Hill, Chattanooga, [Chattanooga 7.5-min quadrangle], Hamilton Co., southern TN (US geologic names lexicons, USGS Bull. 896, 1200).
Standard section: cut on TN Highway 26, at east approach to Sligo Bridge over Caney Fork, 7.1 mi east of courthouse at Smithville, [Sligo Bridge 7.5-min quadrangle], DeKalb Co., southern TN (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Appalachian basin*
Cincinnati arch*
Illinois basin*
Lincoln anticline*
Ozark uplift*
Upper Mississippi embayment*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).