Usage:
Ohanapecosh Formation (WA*)
Geologic age:
Tertiary
Oligocene*
Eocene*
Type section, locality, area and/or origin of name:
Named from Ohanapecosh Hot Springs, a small park community located on WA Highway 5 in southeast corner of Mount Rainier National Park, [Ohanapecosh Hot Springs 7.5-min quadrangle] Lewis Co., WA. Ohanapecosh Hot Springs lies near center of a thick westward-dipping section of Ohanapecosh rocks (Fiske and others, 1963).
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 ([ ]).