Usage:
Alderton Formation (WA*)
Geologic age:
Quaternary (early Pleistocene)*
Type section, locality, area and/or origin of name:
[Type section:] in west wall of Puyallup-Duwamish Valley in gullies under transmission line of Bonneville Power Administration, in center sec. 1, T. 19 N., R. 4 E., about 0.5 mi southwest of Alderton, Pierce Co., northwestern WA. [Named from Alderton] (Crandell and others, 1958).
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 ([ ]).