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Geologic Unit: Josie Leg
Map showing publication footprint
  • Usage in publication:
    • Josie Leg member
  • Modifications:
    • First used
  • Dominant lithology:
    • Graywacke
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Bieler, D.B., and Deininger, R.W., 1987, Geologic setting of the Kowaliga augen gneiss and the Zana granite, northern Alabama Piedmont, IN Drummond, M.S., and Green, N.L., eds., Granites of Alabama: Geological Survey of Alabama Special Publication, no. 2, p. 57-72.


Summary:

Name Josie Leg member of Emuckfaw Formation credited to Bieler and Deininger (1984, GSA Abstracts with Programs, v. 16). Is lower of two informal members of Emuckfaw; underlies Timbergut member. Described as immature, garnet-bearing, metagraywacke assemblage, which is mappable for 60 km in Tallapoosa Co.

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


Map showing publication footprint
  • Usage in publication:
    • Josie Leg formation
  • Modifications:
    • Revised
  • Dominant lithology:
    • Schist
    • Gneiss
    • Amphibolite
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Guthrie, G.M., and Dean, L.S., 1989, Geology of the New Site 7.5-minute quadrangle, Tallapoosa and Clay Counties, Alabama (text): Geological Survey of Alabama Quadrangle Map Series, 9, 2 sheets, 41 p., scale 1:24,000


Summary:

Emuckfaw is elevated to group status because of its lithologic diversity and areal extent. Informal Josie Leg and Timbergut members are upgraded to formation status, but remain informal. Formal proposals are forthcoming by Bieler and Guthrie. Josie Leg consists of an interlayered sequence of garnet biotite muscovite quartz schist, garnet biotite plagioclase gneiss and thin-bedded amphibolite. Corresponds to northern Heard Group of Muangnoicharoen (1975), which is here abandoned. Also includes a distinctive, greenish-gray garnet quartzite here informally referred to as the Perryville quartzite member. Josie Leg is separated from the overlying Timbergut by intensely sheared granite gneiss, here assigned to the Zana Granite. Overlies Wedowee Group. Age shown as pre-Middle Ordovician.

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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