Geologic Unit: Glen Canyon
Glen Canyon Group (AZ*,CO*,NV*,NM*,UT*)
Glen Canyon Sandstone (CO*,UT*)
Not designated. Named from exposures in walls that form the Glen Canyon of the Colorado River, Coconino Co., AZ, and San Juan Co., UT (Gregory and Moore, 1931).
GROUP STATUS (alphabetical): Kayenta Formation (AZ*,CO*,UT*), Moenave Formation (AZ*,NV*,UT*), Navajo Sandstone (AZ*,CO*,NM*,UT*), Wingate Sandstone (AZ*,CO*,NM*,UT*).
Unit Name History:
Overview (Gilluly and Reeside, 1928).
Named (Gregory and Moore, 1931).
Revised, Kayenta Formation named (Baker, 1936).
Navajo Sandstone revised to include Shurtz Sandstone and Lamb Point Tongues (both new); Kayenta Formation revised to include Cedar City and Tenney Canyon Tongues (both new) (Averitt and others, 1955).
Overview; Revised, Moenave Formation assigned and Wingate Sandstone divided into newly named Rock Point and Lukachukai members (Harshbarger and others, 1957).
Age modified; Biostratigraphic dating (Lewis and others, 1961).
Upper contact revised (Phoenix, 1963).
Rank reduced to Glen Canyon Sandstone; Areal limits (Poole and Stewart, 1964).
Areal limits (Wilson and Stewart, 1967).
Areal limits; Overview (Green, 1974).
Upper contact revised; Overview (Peterson and Pipiringos, 1979).
Mapped 1:24k in southwest Moffat Co., CO (Rowley and Hansen, 1979).
Age modified (Padian, 1989).
Age modified; Lower contact revised (Dubiel, 1989).
Areal limits (Condon, 1992).
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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