Usage:
Myrtle Group (OR*)
Subunits:
(alphabetical) --all in OR: Days Creek Formation, Humbug Mountain Conglomerate*, Riddle Formation.
Geologic age:
Late Jurassic to Early Cretaceous*
Type section, locality, area and/or origin of name:
Not synopsized to date. [See US geologic names lexicons, USGS Bull. 896, 1200]
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 ([ ]).