- Usage in publication:
-
- Hagan shale member*
- Modifications:
-
- Named
- Dominant lithology:
-
- Shale
- Sandstone
- AAPG geologic province:
-
- Appalachian basin
Summary:
Named the Hagan shale member of the Clinch sandstone in southwestern VA and northeastern TN for Hagan, Lee Co., VA. Consists of green shale with interbeds of fine-grained sandstone and siliceous sandstone; massive sandstone 1 to 2 feet thick at base. Thickness is 70 to 77 feet. Overlies Sequatchie formation and underlies Poor Ridge Valley member of Clinch. The Hagan 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 ([ ]).