Usage:
Tyee Formation (OR*)
Tyee Sandstone (OR*)
Subunits:
(alphabetical) --all in OR: Baughman Member, Elkton Siltstone Member*, Hubbard Creek Member, Lorane Siltstone Member*, Sacchi Beach Siltstone Member, Tyee Mountain Member.
Geologic age:
early Tertiary (middle Eocene)*
Type section, locality, area and/or origin of name:
[Named from exposures at Tyee Mountain, about 9 mi southeast of Kellogg, in northwestern part of Roseburg quadrangle (scale 1:125,000), Douglas Co., western OR.] Forms prominent escarpment from Tyee Mountain to Camas Valley (Diller, 1898).
AAPG geologic province:
Western Columbia basin*
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 ([ ]).