USGS Visual Identifier
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Geologic Unit: Hoback

Hoback Formation (WY*)

Geologic Province:
Green River basin*
Yellowstone province*
Areal Extent:

Type Locality:
On southwest side of Game Hill opposite mouth of Cliff Creek, in T. 38 N., R. 114 W., Sublette Co., WY (Dorr, 1952).

Skyline Trail Conglomerate Member (WY).

Unit Name History:
First published use (Horberg and others, 1949).
Overview (Dorr, 1952).
Age Modified; Areal limits (Oriel, 1969).
Divided into main body and Skyline Trail Member (Dorr and others, 1977).
Areal limits (Oriel and Platt, 1980).

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