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National Geologic Map Database
Geologic Unit: Tomahawk Creek
Map showing publication footprint
  • Usage in publication:
    • Tomahawk Creek Member
  • Modifications:
    • First used
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
    • Richmond basin
Publication:

Cornet, Bruce, and Olsen, P.E., 1990, Early and middle Carnian (Triassic) flora and fauna of the Richmond and Taylorsville basins, Virginia and Maryland, U.S.A.: Virginia Museum of Natural History Guidebook, no. 1, 83 p.


Summary:

Nomenclature in this report follows Ediger and others (in prep). Richmond basin sequence is divided into three formations (ascending): Tuckahoe Formation, Turkey Branch Formation, and Otterdale Formation. Tomahawk Creek Member is upper member of Turkey Branch Formation, a previously unrecognized sequence. It overlies Hidden Member [first used]. Tomahawk Creek correlates with the lacustrine facies of the Falling Creek Member and the overlying Newfound Member of the Doswell Formation in the Taylorsville basin. Name Chesterfield Group is not used in this report.

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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