USGS Visual Identifier
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Geologic Unit: Cloud Chief

Cloud Chief Formation (OK*,TX)
Cloud Chief Formation of Foss Group (OK)

Permian, Late*
Guadalupian, late*

Geologic Province:
Permian basin*
Anadarko basin*
Bend arch
Palo Duro basin
Areal Extent:

Type Locality:
Named from town of Cloud Chief, in eastern Washita Co., OK, near which unit is typically exposed (Gould, 1924).

(alphabetical): Big Basin Member (OK), Day Creek Dolomite Member (OK*), Eskota Dolomite Member (TX) or Eskota Gypsum Member (TX), Kiger Shale Member (OK), Moccasin Creek Gypsum Member (OK*), Weatherford Member (OK*).

Unit Name History:
Named, replaces "eastern area" of the Greer Formation (Gould, 1924a).
Overview (Gould, [1925]).
OK State Geol. Map usage (Miser, 1926).
Revision suggested (Gould, 1926).
Lower contact revised in OK (Beede and Christner, 1926; Sawyer, 1929).
"Revised"; Mapped as so-called "Whitehorse-Cloud Chief formation" (grouped with Whitehorse Sandstone); Overview (Lloyd and Thompson, 1929).
Abandonment suggested (Clifton, 1930).
Revision suggested (Evans, 1931).
Revision of Evans disputed (Buckstaff, 1931).
Revision to Cloud Chief zone suggested (Roth, 1932).
Overview in TX (Sellards, [1932]).
Revised to member of Quartermaster Formation; Described (Green, 1936).
Mapped in Double Mountain Group on TX State Geol. Map (Darton and others, 1937).
Overview (Roth, 1937).
Revised (Green, 1937; Roth and others, 1941; King, 1942).
OK State Geol. Map usage (Miser and others, 1954).
Overview in OK (Davis, 1955; Myers, 1959).
Overview (Dunbar, 1960).
Overview (Barnes, 1967).
Areal limits (Barnes, 1974).
Overview (Barnes, 1983).
[The use of a hyphen between undifferentiated formations has not been considered proper notation since 1933 (see CSN, Art. 13a, p. 437-438). Where the formations have not been separated in the field, it is considered proper notation to add the word "and", "undifferentiated", "included", etc.; and list formations in order of age (youngest first).]

Note: If you need more information, please contact Nancy Stamm (
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
Database project personnel
Last modified: 15-Jan-2013