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Geologic Unit: Snelson
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Map showing publication footprint
  • Usage in publication:
    • Snelson granite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Granite
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Hewett, D.F., and Crickmay, G.W., 1937, The warm springs of Georgia, their geologic relations and origin; a summary report: U.S. Geological Survey Water-Supply Paper, 819, 40 p.


Summary:

Snelson granite (new name) is made up largely of oligoclase, microcline, quartz, and biotite. Most of the biotite flakes are in rudely parallel layers so that rock has persistent foliation. Foliation shows small folds and minute plications, granite is cut by numerous pegmatite dikes. Considered to be younger than Carolina gneiss, but still Precambrian.

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


Map showing publication footprint
  • Usage in publication:
    • Snelson Gneiss
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Odom, A.L., Kish, S.A., and Russell, C.W., 1985, U-Pb and Rb-Sr geochronology of the basement rocks in the Pine Mountain belt of southwest Georgia, IN Kish, S.A., Hanley, T.B., and Schamel, Steven, Geology of the southwestern Piedmont of Georgia; [No. 5]: Geological Society of America Field Trip Guidebook, 98th annual meeting, Orlando, FL, October 28-31, 1985, p. 12-47.


Summary:

Unit referred to as Gneiss rather than Granite. Regional mapping and contacts show unit intrudes biotite gneiss and schist in the Pine Mountain belt of southwestern GA.

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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