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Geologic Unit: Mannie
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Map showing publication footprint
  • Usage in publication:
    • Mannie clay
  • Modifications:
    • Named
  • Dominant lithology:
    • Clay
    • Shale
  • AAPG geologic province:
    • Appalachian basin
Publication:

Foerste, A.F., 1903, The Cincinnati group in western Tennessee, between the Tennessee River and the central basin: Journal of Geology, v. 11, p. 29-45.


Summary:

Mannie shale or shaly clay forms top of Richmond group in Tennessee River Valley. Is upper part of Fernvale formation. Described as brownish and bluish fossiliferous shaly clays, 16 to 35 ft thick. Overlies Leipers Creek limestone. Age is Late Ordovician.

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


Map showing publication footprint
  • Usage in publication:
    • Mannie Member
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

Chowns, T.M., 1989, Structure and stratigraphy of the Valley and Ridge province in Georgia; Day 1, IN Dallmeyer, R.D., ed., Tectonostratigraphic expression of terrane accretion in the southern Appalachian Orogen; a geotraverse excursion: International Geological Correlation Programme Field Trip Guidebook, July 23-31, 1989, v. 4, p. 1.1-1.19., International Geological Correlation Programme (IGCP) Project No. 233, Terranes in the Circum-Atlantic Paleozoic Orogens


Summary:

In GA, Mannie Member of Sequatchie Formation is only present along Taylor Ridge-Whiteoak Mountain where it is 27 m thick. Seems to occupy an erosional depression in the Shellmound Member. Consists of shales and bioturbated shaly sandstones, which are characterized by abundant trace fossils--CHONDRITES, TRICHOPHYCUS, SKOLITHOS, MONOCRATERION, and DIPLOCRATERION--and phosphatic granules. Unconformably underlies Red Mountain Formation. Depositional environment probably a quiet subtidal embayment.

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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