Usage:
Willamette Silt (OR*)
Subunits:
(alphabetical) --all in OR: Greenback Member, Irish Bend Member, Malpass Member, Wyatt Member.
Geologic age:
Quaternary
Pleistocene*
Type section, locality, area and/or origin of name:
Type section: right bank of Willamette River at Irish Bend in southwestern Linn Co., OR (Allison, 1953).
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 ([ ]).