Usage:
Elkton Siltstone Member of Tyee Formation (OR*-recognized locally in Elkton area)
Geologic age:
early Tertiary (middle Eocene)*
Type section, locality, area and/or origin of name:
Typical strata well exposed in cut along Henderer Road, 1.5 mi west of Elkton, Douglas Co., and in banks of Umpqua River in that vicinity, west-central OR. Entire member exposed between SE/4 sec. 23, T. 22 S., R. 9 W. (base of member), and center sec. 8, T. 23 S., R. 8 W. (top of member), in cuts along road that parallels lower part of Luntsinger Creek (Baldwin, 1961).
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 ([ ]).