- Usage in publication:
-
- Long Savannah formation
- Modifications:
-
- Named
- Dominant lithology:
-
- Mudstone
- Limestone
- AAPG geologic province:
-
- Appalachian basin
Summary:
Named the Long Savannah formation for Long Savannah Creek, near Snow Hill, Hamilton Co., southeastern TN. Consists of red dolomitic mudstone and interbedded buff earthy limestone. Basal layers contain detrital chert and some minor quartz sand. Thickness is 50 to 175 feet. Unit occurs in belts northwest of White Oak Mountain fault in southern TN, AL, and GA. Overlies limestone and dolomite of Early Ordovician age and underlies the Mahan formation. The Long Savannah is of Middle Ordovician (Mohawkian) 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 ([ ]).