- Usage in publication:
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- Verulam 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:
Geographically extended the Verulam Formation to northwestern PA. Unit is a fossiliferous limestone interbedded with dark-gray shale. The Verulam is included with the Lindsay Formation in stratigraphic column. Overlies Bobcaygeon Formation and underlies Utica Formation. The Verulam 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 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 ([ ]).