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

Neathery, T.L., 1975, Rock units in the High-Rank belt of the northern Alabama Piedmont, IN Neathery, T.L., and Tull, J.F., eds., Geologic profiles of the northern Alabama Piedmont: Alabama Geological Society Annual Field Trip Guidebook, December, 1975, no. 13, p. 9-47.


Summary:

Mitchell Dam Amphibolite named in Chilton Co., central AL. Unit is dark-green to brown, layered, and coarse to fine-grained. Age is middle Paleozoic.

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


Map showing publication footprint
  • Usage in publication:
    • Mitchell Dam Amphibolite
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Rheams, K.F., Allison, David, and Tull, J.F., 1986, Mitchell Dam Amphibolite along Alabama Highway 22, east-central Chilton and west-central Coosa Counties, Alabama, IN Neathery, T.L., ed., Southeastern Section of the Geological Society of America, Centennial field guide: Geological Society of America, Southeastern Section, The Decade of North American Geology (DNAG), Centennial Field Guide, v. 6, p. 301-304.


Summary:

Mitchell Dam Amphibolite assigned to Higgins Ferry Group. Inferred age of late Precambrian is assigned to the amphibolite units of the Coosa block, which includes the Mitchell Dam. They are surrounded by and intercalated with metasedimentary schists and gneisses of the Higgins Ferry Group. The Higgins Ferry overlies the Hatchet Creek Group and underlies the Wedowee Group.

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


Map showing publication footprint
  • Usage in publication:
    • Mitchell Dam Amphibolite
  • 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:

Mitchell Dam Amphibolite is described as a dark-green to black, fine- to coarse-grained, thin-layered to massive hornblende-actinolite amphibolte with locally abundant chlorite and biotite. Plagioclase, quartz and clinozoisite are common accessory minerals. All thin amphibolites associated with the Higgins Ferry are included in the Mitchell Dam. Age listed as Precambrian to Paleozoic.

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


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