Usage:
Nuka Formation (AK*)
Geologic age:
Mississippian, Late*
Pennsylvanian, Early(?)*
Type section, locality, area and/or origin of name:
Reference section: Nuka Ridge, between Lat. 68 deg. 38 min. 00 sec. N., Long. 159 deg. 15 min. 15 sec. W., and Lat. 68 deg. 36 min. 30 sec. N., Long. 159 deg. 12 min. 00 sec. W., Brooks Range, northern AK (Tailleur and Sable, 1963; Tailleur and others, 1973).
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 ([ ]).