USGS Visual Identifier
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Geologic Unit: Germer

No current usage.
(†Germer Tuffaceous Member of Challis Volcanics (ID) abandoned. Replaced with Sunnyside tuff (informal) of /Challis Volcanics Group. See Sunnyside.)

Geologic Province:
Idaho Mountains province

Areal Extent:

Type Locality:
Not designated. Named from Germer Basin, in T. 12 N., R. 19 E., Custer Co., ID (Ross, 1937).

Unit Name History:
Name proposed for member of Challis Volcanics (Ross, 1937).
Isotopic dating (Axelrod, 1966).
Abandoned (Fisher and others, 1992).

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