- Usage in publication:
-
- Armuchee chert*
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Chert
- AAPG geologic province:
-
- Appalachian basin
Summary:
Pg. 3. Armuchee chert. Rusty, sandy, bedded chert, at places grading into ferruginous sandstone. Thickness 0 to 50 feet. Underlies Chattanooga shale and overlies Rockwood formation on north side of Coosa Valley, northwest of Coosa fault, northwestern Georgia. Probably contemporary with Frog Mountain sandstone, of Oriskany age, which is present only in the southwest corner of Rome quadrangle. [Age is Early and Middle Devonian.]
[Named from exposures around Armuchee, Floyd Co., northwestern GA.]
Source: US geologic names lexicon (USGS Bull. 896, p. 75).
- Usage in publication:
-
- Armuchee chert
- Modifications:
-
- Not used
- AAPG geologic province:
-
- Appalachian basin (Eastern Overthrust area)
Summary:
Pg. 10. Typical Frog Mountain sandstone is all of Onondaga age. It extends northeast into Georgia, where it is present in Lavender Mountain and in Horseley Mountain, about 1 mile west of Rome, and was mapped by Hayes in Armuchee chert. In both of these mountains this sandstone is immediately underlain by fossiliferous chert which belongs to Armuchee chert of Hayes as described in Rome folio.
Source: US geologic names lexicon (USGS Bull. 896, p. 75).
- Usage in publication:
-
- Armuchee chert*
- Modifications:
-
- Areal extent
Summary:
Armuchee chert. Underlies Frog Mountain sandstone. [Age is Early and Middle Devonian.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 137).
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 ([ ]).