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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Ketchepedrakee 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:

Ketchepedrakee Amphibolite here named for exposures along creek in northern Clay Co. Outcrop belt ranges from 100 to 1000 m. Characteristically green to blue-green in color. Hornblende is dominant mineral.

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


Map showing publication footprint
  • Usage in publication:
    • Ketchepedrakee Amphibolite
  • Modifications:
    • Overview
    • Revised
  • 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:

Ketchepedrakee Amphibolite includes all thin amphibolites associated with the Poe Bridge Mountain Group. Unit is dark-green to black fine- to coarse-grained, layered to massive hornblende actinolite-amphibolite with zones or pods of coarse hornblendite and enstatite-hypersthene pyroxenite. May also include a few felsic dikes, widely scattered pegmatites, and screens of schist and gneiss. Magnetite, ilmenite, zoisite, and quartz are common accessory minerals. Generalized age of Precambrian and Paleozoic shown on chart.

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


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 ([ ]).