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Geologic Unit: Jessamine
Map showing publication footprint
  • Usage in publication:
    • Jessamine substage
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Miller, A.M., 1919, The geology of Kentucky, with an introduction by A.F. Foerste: Kentucky Department of Geology and Forestry Bulletin, 5th series, no. 2, 392 p.


Summary:

Pg. 25. Jessamine substage of Lexington stage. Rather thin-bedded grayish limestone with occasional thin shaly layers intercalated. Thickness 80+/- feet. Characterized by PRASOPORA SIMULATRIX and DALMANELLA BASSLERI. This is same bed named Wilmore by writer in 1905, but that name preoccupied. Underlies Benson bed and overlies Hermitage substage. [Age is Middle Ordovician (Trenton).]
Named from Jessamine Creek, Jessamine Co., central northern KY.

Source: US geologic names lexicon (USGS Bull. 896, p. 1045).


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 ([ ]).

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