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- Usage in publication:
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- Red Knobs formation
- Modifications:
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- Named
- Dominant lithology:
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- Limestone
- Sandstone
- AAPG geologic province:
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- Appalachian basin
Summary:
Named the Red Knobs formation in eastern TN for a thick succession of red to pink calcarenites and limy ferruginous sandstones. Lower part consists of red to pink marble, the Holston marble of other authors. Upper beds, which yield a characteristically dark-maroon sandy regolith, are calcareous sandstones and ferruginous sandy calcarenites with partings of greenish-gray to buff shale. Maximum thickness is 750 feet. Overlies Arline formation and underlies Sevier formation. The Red Knobs 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 ([ ]).