- Usage in publication:
-
- Chewsville Member
- Modifications:
-
- Named
- Dominant lithology:
-
- Shale
- Mudstone
- Sandstone
- Limestone
- Dolomite
- AAPG geologic province:
-
- Appalachian basin
Summary:
Named the Chewsville Member of the Waynesboro Formation in MD, PA, and WV for Chewsville, Washington Co., MD. Consists of interbedded maroon shale, mudstone and argillaceous sandstone, light-gray sandstone, and tan, sandy, dolomitic limestone and dolomite. Thickness is 100 to 150 feet. Overlies the Cavetown Member of the Waynesboro Formation and underlies the Elbrook Formation. Lower contact is placed below siliciclastic interval that overlies the interbedded dolomite and shaly limestone of the Cavetown Member. Upper contact (rarely exposed) is placed above uppermost red sandstone of the Chewsville. The Chewsville is of Early Cambrian 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 ([ ]).