U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Red Knobs formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
    • Sandstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Cooper, G.A., 1956, Chazyan and related brachiopods [U.S.-Canada]: Smithsonian Miscellaneous Collections, v. 127, pt. 1, 1245 p.


Summary:

Named the Red Knobs formation in eastern TN for a thick succession of red to pink calcarenites and limy ferruginous sandstones. Lower part consists of red to pink marble, the Holston marble of other authors. Upper beds, which yield a characteristically dark-maroon sandy regolith, are calcareous sandstones and ferruginous sandy calcarenites with partings of greenish-gray to buff shale. Maximum thickness is 750 feet. Overlies Arline formation and underlies Sevier formation. The Red Knobs is of Middle Ordovician (Mohawkian) age.

Source: GNU records (USGS DDS-6; Reston GNULEX).


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 ([ ]).