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Geologic Unit: Cobourg
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Map showing publication footprint
  • Usage in publication:
    • Cobourg Limestone
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Appalachian basin
Publication:

Fisher, D.W., 1977, Correlation of the Hadrynian, Cambrian, and Ordovician rocks in New York State: New York State Museum Map and Chart Series, no. 25, 5 sheets, 75 p.


Summary:

The name Cobourg has been used more as a time term (Cobourgian) than as a rock-stratigraphic term. The Cobourgian is essentially equivalent to Eden Stage of Cincinnatian Series. Kay (1968) proposed the name Denley to include rocks formerly called Denmark and Cobourg. In Ontario, Cobourg is a valid rock-stratigraphic term. Is of questionable value in NY.

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


Map showing publication footprint
  • Usage in publication:
    • Cobourg Limestone*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

Frey, R.C., 1995, Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati arch region of Kentucky, Indiana, and Ohio, IN Pojeta, John, Jr., ed., Contributions to the Ordovician paleontology of Kentucky and nearby states: U.S. Geological Survey Professional Paper, 1066-P, p. P1-P126.


Summary:

Cobourg Limestone of Middle Ordovician (Cincinnatian, Edenian) age is used in this report.

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


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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