Usage:
Tukwila Formation of Puget Group (WA*)
Geologic age:
Tertiary
Eocene, middle*
Eocene, late*
Type section, locality, area and/or origin of name:
[Type area]: in secs. 11 and 14, T. 23 N., R. 4 E., Des Moines 7.5-min quadrangle, western King Co., WA (Waldron, 1962).
AAPG geologic province:
Puget Sound 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 ([ ]).