Usage:
Makah Formation of Twin River Group (WA*)
Subunits:
(alphabetical) --all in WA*: Baada Point Member, Carpenters Creek Tuff Member, Dtokoah Point Member, Jansen Creek Member, Klachopis Point Member, Third Beach Member.
Geologic age:
Tertiary
Eocene, late*
Oligocene, late*
Type section, locality, area and/or origin of name:
Type section: shore cliffs and wave-cut platform exposures along Strait of Juan de Fuca, from Waadah Island and Baada Point to Kydaka Point, Clallam Co., WA (Snavely and others, 1980).
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).