Usage:
Toats Coulee Magma Group (WA)
Subunits:
(alphabetical) --all in WA: Douglas Mountain Tonalite Porphyry, Loomis Granodiorite, Sarsapkin Tonalite, Sinlahekin Tonalite, Tillman Mountain Tonalite.
Geologic age:
Jurassic, Early
Type section, locality, area and/or origin of name:
Named from Toats Coulee [Creek], in T. 39 and 40 N., R. 23 E., Okanogan Co., WA (Hibbard, 1971).
AAPG geologic province:
Northern Cascade Range-Okanagan 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 ([ ]).