U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Clallam

Usage:

Clallam Formation (WA*)


Geologic age:

Tertiary
Miocene, early*


Type section, locality, area and/or origin of name:

[Type locality]: exposures that extend eastward [8 mi] from Clallam Bay to Pillar Point along south shore of Strait of Juan de Fuca, Clallam Co., WA (Arnold, 1906; Addicott, 1976b).


AAPG geologic province:

Olympic Mountains province*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).