- Usage in publication:
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- Laurel Branch Limestone
- Modifications:
-
- Named
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Appalachian basin
Summary:
The Laurel Branch Limestone, informally named by Sanders (1952), is here named in the Greendale syncline in Hawkins and Grainger Cos., TN, where Mississippian strata previously named Newman Limestone by Hardeman and others (1966), are isolated from the Newman Limestone in the Newman Ridge syncline. The Laurel Branch consists of gray, fine-grained limestone with nodules and lenses of black chert and a distinctive zone 4.5 m (15 ft) thick of calcareous siltstone and shale. Overlies Pressmens Home Formation; underlies Snow Flake Formation. Correlates with the lower part of the St. Louis Limestone. Thickness is 24 m. Age is Mississippian.
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 ([ ]).