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Geologic Unit: Atokan
Map showing publication footprint
  • Usage in publication:
    • Atoka stage
  • Modifications:
    • Revised
Publication:

Cheney, M.G. (chairman), Dott, R.H., Hake, B.F., Moore, R.C., Newell, N.D., Thomas, H.D., and Tomlinson, C.W., 1945, Classification of Mississippian and Pennsylvanian rocks of North America: American Association of Petroleum Geologists Bulletin, v. 29, no. 2, p. 125-169., Prepared by the Association Subcommittee on Carboniferous


Summary:

Pg. 156. Atoka stage. Discussion of main divisions of Pennsylvanian system. Pronounced unconformities are reported within thick type Atoka section; hence it is thought to represent considerable length of time and complex geologic history. If Atoka division is not given rank of series, it might be given rank of group; if time-rock term stage is to be used for Paleozoic rock divisions as it is in Europe and as it has been introduced for Mesozoic and Cenozoic rocks of United States, this division could appropriately be called Atoka stage.

Source: US geologic names lexicon (USGS Bull. 1200, p. 165-167).


Map showing publication footprint
  • Usage in publication:
    • Atoka series
  • Modifications:
    • Revised
Publication:

Spivey, R.C., and Roberts, T.G., 1946, Lower Pennsylvanian terminology in central Texas: American Association of Petroleum Geologists Bulletin, v. 30, no. 2, p. 181-186.


Summary:

Pg. 185-186. Atoka series. Raised to series rank and defined to include all beds from top of Wapanucka limestone. Morrow series, to base of Hartshorne sandstone, Des Moines series. As thus defined, includes Marble Falls, Smithwick, and overlying FUSULINELLA (restricted)-bearing beds of central and north Texas, Derry series of New Mexico and west Texas, and equivalent beds in other areas as equivalence is established.

Source: US geologic names lexicon (USGS Bull. 1200, p. 165-167).


Map showing publication footprint
  • Usage in publication:
    • Atokan stage
  • Modifications:
    • Revised
Publication:

Moore, R.C., and Thompson, M.L., 1949, Main divisions of Pennsylvanian Period and System: American Association of Petroleum Geologists Bulletin, v. 33, no. 3, p. 275-302.


Summary:

Pg. 292. Rocks of Oklan series (new) are divisible into two stages, Atokan (or Derryan) and Desmoinesian.

Source: US geologic names lexicon (USGS Bull. 1200, p. 165-167).


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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