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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Red Top Mountain Schist*
  • Modifications:
    • Named
  • Dominant lithology:
    • Schist
  • 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 Red Top Mountain Schist of the Allatoona Complex is here named for exposures in Red Top Mountain State Park, GA. It consists of highly deformed and generally granitized red, silver, and gray schists that occur as xenoliths and roof-pendants in Corbin Gneiss, and which also form its country rock. Age is Middle Proterozoic.

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


Map showing publication footprint
  • Usage in publication:
    • Red Top Mountain Formation*
  • Modifications:
    • Revised
    • Age modified
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Crawford, T.J., Higgins, M.W., Crawford, R.F., Atkins, R.L., Medlin, J.H., and Stern, T.W., 1999, Revision of stratigraphic nomenclature in the Atlanta, Athens, and Cartersville 30' x 60' quadrangles, Georgia: Georgia Geologic Survey Bulletin, no. 130, 45 p.


Summary:

Detailed mapping has shown that rocks assigned to Red Top Mountain Schist by Higgins and others (1988) are not schist except where sheared. Most prevalent rock is high-grade metamorphosed mafic meta-igneous rock intruded by Corbin Metagranite (revised) and exposed as xenoliths and roof pendants. Name is therefore changed to Red Top Mountain Formation. Red Top Mountain Formation intrudes Early(?) to Middle Proterozoic Rowland Spring Formation (new). Age is changed to Early(?) to Late(?) Proterozoic because it must be older than Middle(?) to Late Corbin Metagranite which has intruded it.

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


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).