The National Geologic Map Database is migrating to a new infrastructure. We apologize for any service disruptions during this process.
|
|---|
- Usage in publication:
-
- Poor Valley Ridge member*
- Modifications:
-
- Named
- Dominant lithology:
-
- Sandstone
- Shale
- AAPG geologic province:
-
- Appalachian basin
Summary:
Named the Poor Valley Ridge member of the Clinch sandstone in southwestern VA and northeastern TN for Poor Valley Ridge, Lee Co., VA. Consists of fine- to medium-grained, buff to greenish-white sandstone in beds a few inches to two feet thick, with partings and interbeds of green shale. Sandstone most massive in lower part; shale most abundant in upper part. Thickness is 183 feet. Overlies Hagan member of Clinch sandstone and underlies Clinton shale. The Poor Valley Ridge is of Early Silurian 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 ([ ]).