USGS Visual Identifier
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Geologic Unit: Kaibab

Kaibab Limestone (AZ*,NV*,UT*)
Kaibab Limestone of Park City Group (NV*,UT*)
Kaibab Formation (AZ*,NV*,UT)
Kaibab Marble (CA*)
Kaibab Group (UT)

Permian, Early*

Geologic Province:
Plateau sedimentary province*
Black Mesa basin*
Paradox basin*
Salton basin*
Basin and Range province*
Great Basin province*
Areal Extent:

Type Locality:
Not designated. Named from Kaibab Plateau, north side of Grand Canyon, Coconino Co., AZ (Darton, 1910).
Reference section: from southwest corner sec. 12, T. 33 N., R. 9 W., to top of Huricane Cliffs, Whitmore Point 7.5-min quadrangle, Mohave Co., AZ (Sorauf and Billingsley, 1991).

FORMATION STATUS (alphabetical): Fossil Mountain Member (AZ*,NV*,UT), Harrisburg Member (AZ*,NV*,UT*).

Unit Name History:
Name proposed for the upper formation of Aubrey Group (Darton, 1910).
Revised, Harrisburg Member named (Bassler and Reeside, 1921).
Areal limits (Gilluly and Reeside, 1928; Gregory and Moore, 1931).
Redescribed as Kaibab Formation; lower contact revised and Kaibab informally divided into (ascending) alpha, beta, and gamma units (McKee, 1938).
Upper contact revised (Blakey, 1974).
Raised to group rank and divided into several formations; Areal limits (Welsh and others, 1979).
Redescribed as Kaibab Marble in CA; Areal limits (Hamilton, 1982).
Redescribed as Kaibab Formation (Ulrich and others, 1984).
Redescribed as Kaibab Formation; Reference section; Revised, divided into (ascending): Fossil Mountain (new) and Harrisburg members (Sorauf and Billingsley, 1991).
Areal limits (Anderson and Hintze, 1993).

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