Usage:
Silver Pass Volcanic Member of Swauk Formation (WA*)
Silver Pass Volcanics (WA)
Geologic age:
Tertiary
Eocene, early*
Type section, locality, area and/or origin of name:
Type area: Silver Pass, between Silver Creek and French Cabin Creek, both of which drain the region between Kachess and Cle Elum Lakes, [Kachess Lake 7.5-min quadrangle] Kittitas Co., WA (Foster, 1960).
AAPG geologic province:
Cascades 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).