The National Geologic Map Database is migrating to a new infrastructure. We apologize for any service disruptions during this process.

U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Hackneyville spotted schist
  • Modifications:
    • First used
  • Dominant lithology:
    • Schist
  • 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:

The Wedowee is here raised from Formation to Group rank and subdivided into the Hackneyville spotted schist, the Cragford Schist, and two unnamed metasedimentary sequences. The Hackneyville is a quartz-albite-muscovite-(sericite) biotite schist with local occurrences of cordierite(?), andalusite, and graphite. Muscovite porphyroblasts as large as 1 in. in diameter characterize the unit. Unit is probably a product of contact metamorphism related to the genesis of the Pinckneyville Granite Complex. Grades northward into the Cragford.

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


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

Neathery, T.L., and Reynolds, J.W., 1975, Geology of the Lineville East, Ofelia, Wadley North, and Mellow Valley quadrangles, Alabama: Geological Survey of Alabama Bulletin, no. 109, p. 1-120.


Summary:

Name Hackneyville Schist of Wedowee Group is here formally proposed. Unit is medium- to coarse-grained, intensely foliated, and highly metamorphosed.

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


Map showing publication footprint
  • Usage in publication:
    • Hackneyville Schist
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Raymond, D.E., Osborne, W.E., Copeland, C.W., and Neathery, T.L., 1988, Alabama stratigraphy: Geological Survey of Alabama Circular, no. 140, 97 p.


Summary:

Hackneyville Schist of Wedowee Group occurs in the Northern Piedmont of east-central AL. Unit is a medium- to coarse-grained quartz-albite-muscovite-biotite schist, graphite-muscovite-quartz schist, quartz-plagioclase-almandine-kyanite-muscovite schist, and biotitic quartzite. Commonly contains muscovite, andalusite and/or chiastolite porphyroblasts in south-central Clay Co. Pods of massive sillimanite occur in the higher grade metamorphic rocks.

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


Search archives

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 ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Thu 21 May 2026 05:05:07 PM MDT