- Usage in publication:
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- Bobcaygeon Formation
- Modifications:
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- Areal extent
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Appalachian basin
Summary:
It is here proposed that along Lake Erie in Erie Co, northwestern PA, the unit of interbedded calcarenite, calcilutite, and calcisiltite which occupies the position of the Benner Formation to the east, be called the Bobcaygeon Formation, extended from Ontario, CAN. As in Ontario, the Bobcaygeon overlies the Gull River Formation and underlies the Verulam Formation, which grades into the Nealmont Formation in northwestern PA. Age is Middle Ordovician.
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 ([ ]).