U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Cobourg
Search archives
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

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 ([ ]).