USGS Visual Identifier
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Geologic Unit: Hanson Creek

Hanson Creek Formation (ID*,NV*)

Ordovician, Middle*
Ordovician, Late*
Silurian, Early*
Geologic Province:
Great Basin province*
Idaho Mountains province*

Areal Extent:

Type Locality:
"Typical" exposures occur on west side of Roberts Creek Mountain, Eureka Co, NV. Derivation of name not stated by author, but probably named from Pete Hanson Creek (Merriam, 1940).

Combs Canyon Dolomite Member (NV*).

Unit Name History:
Named (Merriam, 1940).
Overview (Dover, 1983).

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