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Map showing publication footprint
  • Usage in publication:
    • Forge Creek Suite
  • Modifications:
    • Named
    • Geochronologic dating
  • Dominant lithology:
    • Gneiss
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Bartholomew, M.J., and Lewis, S.E., 1984, Evolution of Grenville massifs in the Blue Ridge geologic province, southern and central Appalachians, IN Bartholomew, M.J., ed., The Grenville event in the Appalachians and related topics: Geological Society of America Special Paper, 194, p. 229-254.


Summary:

The Forge Creek Suite is here named in the Watauga massif in the Blue Ridge in TN, NC, and VA. It contains the Watauga River Gneiss in TN and NC, and the Comers and Grayson Gneisses in VA. Biotite dioritoid forms the coarse-grained Grayson Gneiss core facies. Medium-grained biotite granitoid forms the marginal Comers Gneiss facies. This facies is gradational into granitoid of the Watauga River Gneiss. Age is Middle Proterozoic based on Rb-Sr ages.

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 ([ ]).

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