- Usage in publication:
-
- Dryden formation
- Modifications:
-
- Named
- Dominant lithology:
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- Limestone
- Shale
- AAPG geologic province:
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- Appalachian basin
Summary:
Named the Dryden formation for Dryden, Lee Co., VA. Name is used for combined Benbolt and Wardell formations when these two units are not separated by the Gratton formation. Consists mostly of limestone, but may contain conspicuous amounts of shale as at Rye Cove and Lone Mountain. Thickness is 300 to 500 feet. Unit overlies the Surgener formation in TN and the Peery-Ward Cove sequence in VA, and underlies the Witten formation. The Dryden 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 ([ ]).