GEOLEX database Geologic Unit: Kaibab Usage: Kaibab Limestone (AZ*,NV*,UT*) Kaibab Limestone of Park City Group (NV*,UT*) Kaibab Formation (AZ*,NV*,UT) Kaibab Marble (CA*) Kaibab Group (UT) Age: Permian, Early* Leonardian* Geologic Province: Plateau sedimentary province* Black Mesa basin* Paradox basin* Salton basin* Basin and Range province* Great Basin province* Areal Extent: AZ(n)* CA(se)* NV(ec)* UT(s)* 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). Subunits: 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 (nstamm@usgs.gov). 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 URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html Database project personnel Last modified: 15-Jan-2013