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Geologic Unit: Coweeta
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Map showing publication footprint
  • Usage in publication:
    • Coweeta Group
  • Modifications:
    • Named
  • Dominant lithology:
    • Gneiss
    • Metasandstone
    • Quartzite
    • Schist
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Hatcher, R.D., Jr., 1979, The Coweeta Group and Coweeta syncline; major features of the North Carolina-Georgia Blue Ridge: Southeastern Geology, v. 21, no. 1, p. 21-23.


Summary:

Coweeta Group formally named in Macon Co., west-central NC, where it occupies syncline resulting from polyphase deformation. Composed of feldspar-quartz-biotite gneiss, metasandstone, quartzite, and schist. Thickness ranges from 2,000 to 4,000 m. Includes Persimmon Creek Gneiss, Coleman River Formation, and Ridgepole Mountain Formation (all formally named in this report). Overlies Tallulah Falls Formation; upper contact not observed. Age is late Precambrian(?).

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Coweeta Group†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Higgins, M.W., Atkins, R.L., Crawford, T.J., Crawford, R.F., III, Brooks, Rebekah, and Cook, R.B., Jr., 1988, The structure, stratigraphy, tectonostratigraphy, and evolution of the southernmost part of the Appalachian Orogen, Georgia and Alabama: U.S. Geological Survey Professional Paper, 1475, 173 p., (incl. geologic map, scale 1:500,000)


Summary:

The Coweeta Group of Hatcher (1979), and informally named units assigned to it, the Persimmon Creek gneiss, Coleman River formation, and Ridgepole Mountain formation, are here abandoned. Mapping for this study shows that the Coweeta Group belongs partly to the Sandy Springs Group and partly to the Richard Russell Formation in the Bill Arp thrust sheet.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Coweeta Group
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Raymond, L.A., Yurkovich, S.P., and McKinney, Marjorie, 1989, Block-in-matrix structures in the North Carolina Blue Ridge belt and their significance for the tectonic history of the southern Appalachian Orogen, IN Horton, J.W., Jr., and Rast, Nicholas, eds., Melanges and Olistostromes of the U.S. Appalachians: Geological Society of America Special Paper, 228, p. 195-215.


Summary:

Composes part of Toe terrane, which also includes Ashe Metamorphic Suite, Alligator Back Metamorphic Suite, and Tallulah Falls Metamorphic Suite. Age is Late Proterozoic.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Coweeta Group
  • Modifications:
    • Revised
    • Age modified
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Peper, J.D., Lesure, F.G., Cox, L.J., and D'Agostino, J.P., 1991, Geology, geochemistry, and mineral resource assessment of the Southern Nantahala Wilderness and adjacent roadless areas, Rabun and Towns Counties, Georgia, and Clay and Macon Counties, North Carolina: U.S. Geological Survey Bulletin, 1883, 30 p.


Summary:

Coweeta Group and its Persimmon Creek Gneiss, Coleman River Formation, and Ridgepole Mountain Formation are used informally in this report (local usage of Hatcher, 1979). Age changed from Late Proterozoic to Late Proterozoic and early Paleozoic. All formations are found in Richard Russell thrust sheet, east of Shope Fork fault.

Source: GNU records (USGS DDS-6; Reston GNULEX).


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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 ([ ]).

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