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National Geologic Map Database

Geologic Unit: Otuk

Usage:

Otuk Formation of Etivluk Group (AK*)
Otuk Formation (AK*)


Subunits:

Blankenship Member (AK*).


Geologic age:

Triassic, Early*
Triassic, Middle*
Triassic, Late*
Jurassic, Early*
Jurassic, Middle*


Type section, locality, area and/or origin of name:

Type section: bluff on east bank of Otuk Creek, in sec. 31, T. 10 S., R. 16 W., Killik River 1:250,000 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).