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Usage:
Humptulips Formation (WA)
Geologic age:
Tertiary
Eocene, middle
Eocene, late
Type section, locality, area and/or origin of name:
Exposures in the East Fork of the Humptulips River, from its confluence with the East Fork upstream to the volcanics of the Crescent Formation, Grays Harbor Co., WA (Rau, 1984).
AAPG geologic province:
Oregon-Washington Coast Ranges 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 ([ ]).