USGS Visual Identifier
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Geologic Unit: Banbury

Banbury Basalt of Idaho Group (ID*)
Banbury Formation of Idaho Group (ID*)

Geologic Province:
Snake River basin*
Great Basin province*
Areal Extent:

Type Locality:
Exposures near Banbury Hot Springs, in sec. 33, T. 8 S., R. 14 E., Twin Falls Co., ID. Named from Banbury Hot Springs (Stearns, 1936, Table 1).

Unit Name History:
Named (Stearns, 1936, Table 1).
Overview (Stearns and others, 1938).
Overview; Revised to 2nd formation from base (of 7) of Idaho Group (Malde and Powers, 1962).
Redescribed; Areal limits (Axelrod, 1964; Coats, 1964).
Isotopic dating (Armstrong and others, 1975).
Restricted from Great Basin province, rocks reassigned to Big Island Formation (Coats, 1985).
Not used (Foord and others, 1987; Jenks and Bonnichsen, 1990).

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