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Map showing publication footprint
  • Usage in publication:
    • Wacoochee Complex
  • Modifications:
    • Named
  • Dominant lithology:
    • Schist
    • Gneiss
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Bentley, R.D. (editor), and Neathery, T.L. (editor), 1970, Geology of the Brevard fault zone and related rocks of the Inner Piedmont of Alabama: Alabama Geological Society Annual Field Trip Guidebook, December 4-5, 1970, no. 8, 119 p.


Summary:

Name Wacoochee Complex introduced here for the stratigraphically lowest unit of the Pine Mountain Block. Consists of feldspathic mica schist and biotite gneiss (metagraywacke) intermixed with cataclastic augen gneiss. The Wacoochee is migmatized and cut by many granitic plutons. The augen gneiss is characterized by potassium-feldspar augens as much as 2 in. long in a biotite-muscovite-quartz matrix. A similar augen gneiss has been mapped as the Woodland Gneiss by Hewett and Crickmay (1937) and rocks similar to the metasediments of the Wacoochee were mapped by them as Sparks Schist, which lies stratigraphically below the Pine Mountain Group.

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


Map showing publication footprint
  • Usage in publication:
    • Wacoochee Complex*
  • 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 Wacoochee Complex of Bentley and Neathery (1970), Grenville basement rocks in the Pine Mountain anticlinorium in the Bill Arp thrust sheet in central and west-central GA and in east-central AL, is accepted by the USGS. It includes the Woodland Gneiss, Cunningham Granite, Apalachee Formation, and Sparks Schist. It structurally underlies the Hollis Quartzite of the Pine Mountain Group. Age is Middle Proterozoic.

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


Map showing publication footprint
  • Usage in publication:
    • Wacoochee Complex*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Steltenpohl, M.G., and Kunk, M.J., 1993, 40Ar/39Ar thermochronology and Alleghanian development of the southernmost Appalachian Piedmont, Alabama and southwest Georgia: Geological Society of America Bulletin, v. 105, no. 6, p. 819-833.


Summary:

In the Pine Mountain belt (Pine Mountain window), Middle Proterozoic basement rocks are represented by Wacoochee Complex and its components, Whatley Mill Gneiss and Halawaka Schist. Overlying cover sequence is represented by Pine Mountain Group, which consists of (ascending) Hollis Quartzite, Manchester Schist, and Chewacla Marble (Bentley and Neathery, 1970; Sears and others, 1981; and Crickmay, 1952). Report includes geologic sketch map.

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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