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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Greensport Formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Siltstone
    • Limestone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Drahovzal, J.A., and Neathery, T.L., 1971, Middle and Upper Ordovician stratigraphy of the Alabama Appalachians, IN Drahovzal, J.A., and Neathery, T.L., eds., The Middle and Upper Ordovician of the Alabama Appalachians: Alabama Geological Society Annual Field Trip Guidebook, December, 1971, no. 9, p. 1-62.


Summary:

Named Greensport Formation for Greensport Gap on the Coosa River, Etowah Co., AL. Consists of red, yellow, and tan, thin-bedded siltstone, calcilutite, and shale clasts. The Greensport overlies the Little Oak and Lenoir Limestones, and underlies the Colvin Mountain Sandstone. Unit is of Middle Ordovician age.

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


Map showing publication footprint
  • Usage in publication:
    • Greensport Formation*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
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 Greensport Formation of Drahovzal and Neathery (1971), of the Chickamauga Group in AL and the Chickamauga Supergroup in GA as redefined by Neathery (1986), in the Kingston and Clinchport thrust sheets, is here accepted by the USGS. Unconformably overlies the Lenoir Limestone in AL and the Knox Group in GA. Underlies the Colvin Mountain Sandstone of the Chickamauga Group or Supergroup.

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 ([ ]).