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

Stephenson, L.W., and Monroe, W.H., 1938, Stratigraphy of the Upper Cretaceous series in Mississippi and Alabama: American Association of Petroleum Geologists Bulletin, v. 22, no. 12, p. 1639-1657. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Pg. 1655-1657. Arcola limestone member of Selma chalk. Defined as a member of Selma chalk. Thin but persistent unit, consisting of layers of pure hard limestone, interbedded with chalk. Lies about 300 feet above base of Selma. Thickness about 29 feet. [Age is Late Cretaceous.]
Type locality: in bluff at old Arcola Landing on Black Warrior River, in NE/4 sec. 4, T. 18 N., R. 3 E., Hale Co., about 5 mi northeast of Demopolis, AL. Unit has been traced from Bullock Co. westward through AL and northward through MS nearly to Mooreville in Lee Co.

Source: US geologic names lexicon (USGS Bull. 1200, p. 127-128); Alabama Geol. Survey Circ. 140, p. 22-23.


Map showing publication footprint
  • Usage in publication:
    • Arcola limestone member*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Mid-Gulf Coast basin
Publication:

Eargle, D.H., Monroe, W.H., and Morris, J.H., 1946, Geologic map of the Aliceville, Mantua, and Eutaw quadrangles, Alabama, showing pre-Selma Upper Cretaceous formations: U.S. Geological Survey Oil and Gas Investigations Map, OM-50, 1 sheet, scale 1:126,720


Summary:

Arcola limestone member reallocated to member status in the Mooreville chalk of Selma group. Unconformably underlies Demopolis chalk.

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


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

Dowsett, H.J., 1989, Documentation of the Santonian-Campanian and Austinian-Tayloran Stage boundaries in Mississippi and Alabama using calcareous microfossils: U.S. Geological Survey Bulletin, 1884, 20 p.


Summary:

In MS the Austinian-Tayloran boundary occurs within the Mooreville Formation approximately 21+/-6 m above the Santonian-Campanian boundary. In AL, the Santonian-Campanian boundary occurs within the Mooreville, approximately 35 m above the Eutaw-Mooreville contact, and the Austinian-Tayloran boundary occurs within the Mooreville approximately 36.5 m above the Santonian-Campanian boundary. The Arcola Limestone Member of the Mooreville, previously used to designate the Austinian-Tayloran boundary, lies well within the Tayloran Stage. In eastern MS the Santonian-Campanian boundary occurs within the Tombigbee Sand Member of the Eutaw Formation.

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


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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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