Usage:
No current usage.
(†Kugruk Group (AK) abandoned.)
Geologic age:
Ordovician
Silurian
Devonian(?)
Type section, locality, area and/or origin of name:
Not stated. Origin of name not stated by author, but probably named from Kugruk Mountain or Kugruk River, northwestern Seward Peninsula, west-central AK (Collier, 1902).
AAPG geologic province:
Seward Peninsula province
Alaska West-Central 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 ([ ]).