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  • Usage in publication:
    • Treadwell Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
    • Sandstone
  • AAPG geologic province:
    • South Georgia sedimentary province
Publication:

Huddlestun, P.F., and Hetrick, J.H., 1979, The stratigraphy of the Barnwell Group of Georgia: Georgia Geologic Survey Open-File Report, no. 80-1, 89 p.


Summary:

Calcareous sand and sandy limestone above the Riggins Mill Member of the Clinchfield Formation in Twiggs Co., GA, here named Treadwell Member of Clinchfield. Unit measures 4.1 m at type locality. Its hard limestone and sandstone form ledges between less indurated sand beds. Unit is fossiliferous. Contacts with underlying Riggins Mill and overlying Tivola Limestone of Ocala Group are gradational. Known definitely only in Twiggs Co. [Unit was actually formally named in Georgia Bulletin 95 (1985) by these same authors, but unit was annotated from this Open-File Report for Bulletin 1564 (Lexicon).]

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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