Usage:
No current usage?
(†Dallas Limestone Member of Yamhill Formation (OR) considered abandoned? Uncertain if used by the OR Geol. Survey. Possibly replaced with Rickreall Limestone Member of Yamhill Formation. See also Rickreall.)
Geologic age:
early Tertiary (middle Eocene)
Type section, locality, area and/or origin of name:
Notable exposures in northeast part of T. 8 S., R. 6 W., from 2 to 4 mi southwest of Dallas, Polk Co., on western edge of Willamette Valley, western OR. Extensively quarried (Allen, 1946).
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 ([ ]).