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Geologic Unit: Shubuta
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Map showing publication footprint
  • Usage in publication:
    • Shubuta member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Clay
  • AAPG geologic province:
    • Mid-Gulf Coast basin
Publication:

Murray, G.E., 1947, Cenozoic deposits of central Gulf Coastal Plain: American Association of Petroleum Geologists Bulletin, v. 31, no. 10, p. 1825-1850. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Pg. 1838 (fig. 6), 1839 (footnote). Shubuta (clay) member of Yazoo clay (or formation) proposed for 20 to 250 feet of clays and clayey marls, underlain by the Pachuta (marl) member (new) and overlain by the Forest Hill or Red Bluff clay of the Oligocene. Recognized in eastern Mississippi and western Alabama. Age is late Eocene.
Type locality: east side of Chickasawhay River, just north of U.S. Highway 45 bridge east of Shubuta, in SW/4 sec. 3, T. 10 N., R. 16 E., Clarke Co., eastern MS.

Source: US geologic names lexicon (USGS Bull. 1200, p. 3591).


Map showing publication footprint
  • Usage in publication:
    • Shubuta member*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Mid-Gulf Coast basin
Publication:

Toulmin, L.D., LaMoreaux, P.E., and Lanphere, C.R., 1951, Geology and water resources of Choctaw County, Alabama: Geological Survey of Alabama Special Report, no. 21, 197 p., Also issued as Alabama Geol. Survey County Rpt., no. 2, 1951


Summary:

Pg. 122, 126, pl. 3. Shubuta member of Yazoo clay. In Choctaw County, western Alabama, consists of light-greenish-gray and white highly calcareous clay which weathers to light greenish yellow to white; contains small irregular white lime concretions; in many places it is a white chalky calcareous clay or clayey limestone. Thickness 25 to 35 feet. [Age is late Eocene.]

Source: US geologic names lexicon (USGS Bull. 1200, p. 3591).


Map showing publication footprint
  • Usage in publication:
    • [Shubuta member]
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Arkla basin
Publication:

Murray, G.E., 1952, Vicksburg stage and Mosely Hill formation, IN Geological notes: American Association of Petroleum Geologists Bulletin, v. 36, no. 4, p. 700-707.


Summary:

Pg. 702 (fig. 1), 703. [Shubuta member of Yazoo clay of the Jackson group.] Underlies Mosley Hill formation. [Age is late Eocene.]

Source: US geologic names lexicon (USGS Bull. 1200, p. 3591).


Map showing publication footprint
  • Usage in publication:
    • Shubuta Member
  • Modifications:
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Mid-Gulf Coast basin

Map showing publication footprint
  • Usage in publication:
    • Shubuta Member
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Mid-Gulf Coast basin
Publication:

Mancini, E.A., 1979, Eocene-Oligocene boundary in southwest Alabama: Gulf Coast Association of Geological Societies Transactions, v. 29, p. 282-289.


Summary:

Eocene-Oligocene boundary occurs at the top of this unit.

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


Map showing publication footprint
  • Usage in publication:
    • Shubuta Member*
  • Modifications:
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Mid-Gulf Coast basin
Publication:

Keller, Gerta, 1985, Eocene and Oligocene stratigraphy and erosional unconformities in the Gulf of Mexico and Gulf Coast: Journal of Paleontology, v. 59, no. 4, p. 882-903.


Summary:

Age of Shubuta Member changed from late Eocene to late Eocene and early Oligocene based on study of planktonic Foraminifera. [This revised age is not widely accepted by other workers in the area.]

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


Map showing publication footprint
  • Usage in publication:
    • Shubuta Member
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Mid-Gulf Coast basin
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:

Pg. 78-79. Shubuta Member of Yazoo Clay of the Jackson Group. Light-greenish-gray to white fossiliferous, calcareous clay containing many small irregular white calcareous nodules. Grades eastward from the Tombigbee River into grayish-yellow-green sandy, very glauconitic marl and white limestone of the Crystal River Formation. Overlies Pachuta Marl Member of the Yazoo Clay and unconformably underlies Red Bluff Clay (Oligocene). Thickness ranges from 20 to 36 feet. Present in southwestern Alabama. Age is late Eocene (Priabonian).
See also L.D. Toulmin, 1977, Alabama Geol. Survey Mon., no. 13, p. 126-129.

Source: Publication.


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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 ( ).

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