Usage:
Etivluk Group (AK*)
Subunits:
(alphabetical) --all in AK*: Imnaitchiak Chert, Otuk Formation, Siksikpuk Formation.
Geologic age:
Pennsylvanian, Early*
Permian*
Triassic*
Jurassic, Early*
Jurassic, Middle*
Type section, locality, area and/or origin of name:
Type locality (composite): type locality of Siksikpuk Formation, [in secs. 21 and 23, T. 12 S., R. 1 E.], and type section of Otuk Formation, [in sec. 31, T. 10 S., R. 16 W., Killik River quadrangle], northern AK (Mull and others, 1982).
AAPG geologic province:
Alaska Northern region*
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 ([ ]).