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National Geologic Map Database
Geologic Unit: Woodland
Map showing publication footprint
  • Usage in publication:
    • Woodland gneiss*
  • Modifications:
    • Named
  • Dominant lithology:
    • Gneiss
  • 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:

Woodland gneiss named for town in Talbot Co., western GA. Predominantly a coarse-grained biotite augen gneiss. Persistently underlies basal bed of Hollis quartzite. 100 ft or more of gneiss immediately underneath quartzite is thinly laminated, locally schistose. Progressively lower or deeper in the mass, the lamination is more widely spaced, and rock assumes common gneissic texture. Because gneiss is the most completely metamorphosed of the igneous rocks of the region, it is assumed to be the oldest. Intruded by Cunningham granite (new). Age is Precambrian.

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


Map showing publication footprint
  • Usage in publication:
    • Woodland Gneiss
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Sears, J.W., and Cook, R.B., Jr., 1984, An overview of the Grenville basement complex of the Pine Mountain window, Alabama and Georgia, IN Bartholomew, M.J., ed., The Grenville event in the Appalachians and related topics: Geological Society of America Special Paper, 194, p. 281-287.


Summary:

Name Woodland Gneiss is here extended into AL to encompass rocks formerly mapped as Wacoochee Complex as units are structurally continuous and lithologically similar. In Lee Co., AL, gneisses similar to those at type locality are here assigned to Woodland.

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


Map showing publication footprint
  • Usage in publication:
    • Woodland Gneiss
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Piedmont-Blue Ridge province

Map showing publication footprint
  • Usage in publication:
    • Woodland Gneiss*
  • Modifications:
    • Revised
  • 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 Woodland Gneiss is assigned to the Grenville basement Wacoochee Complex, in the Pine Mountain anticlinorium, in the Bill Arp thrust sheet in central and west-central GA. Age is Middle Proterozoic.

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


Map showing publication footprint
  • Usage in publication:
    • Woodland Gneiss*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Piedmont-Blue Ridge province

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 ([ ]).