- Usage in publication:
-
- Dog River Formation
- Modifications:
-
- Named
- Dominant lithology:
-
- Gneiss
- Schist
- Amphibolite
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
The unnamed lower unit on the northwest limb of the Austell-Frolona antiform, lying gradationally above the Mud Creek Formation of the New Georgia Group, is here named the Dog River Formation of the Sandy Springs Group (western belt). It is composed of an intercalated sequence of muscovite-biotite-quartz-feldspar gneiss (metagraywacke), garnet-muscovite schist, amphibolite, and thin layers of banded iron formation. Conformably underlies the Andy Mountain Formation of the Sandy Springs Group (western belt). It is equivalent to the Powers Ferry Formation of the Sandy Springs Group (eastern belt).
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Dog River Formation
- Modifications:
-
- Areal extent
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Dog River Formation is restricted to the southwestern portion of the study area where it gradationally overlies rocks of undifferentiated New Georgia Group.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Dog River Formationâ€
- Modifications:
-
- Abandoned
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
The Dog River Formation of McConnell and Abrams (1984), assigned by them to the Sandy Springs Group [western belt], is here abandoned because quartzites containing magnetite mapped as Dog River Formation near Dog River southeast of Villa Rica, GA, belong to the Powers Ferry Formation of the Sandy Springs Group [eastern belt]. [Powers Ferry now Powers Ferry Member of Stonewall Gneiss.]
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 ([ ]).