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National Geologic Map Database
Geologic Unit: Eidson
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  • Usage in publication:
    • Eidson member
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
    • Chert
  • 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 Eidson member of the Lincolnshire formation for Eidson, Hawkins Co., northeastern TN. Member is thin part of Lincolnshire that underlies the Hogskin shale. Consists of dark limestone containing black chert. Unit is present in Clinch, Hogskin, and Beaver Valleys. The Eidson is of Middle Ordovician 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 ([ ]).