No current usage.
(†Kushtaka Formation (AK) replaced with Kulthieth Formation. See Kulthieth.)
Tertiary
Eocene
Oligocene(?)
Not synopsized to date. Named from exposures in valley of Bering River and on shores of Lake Kushtaka, Controller Bay region, southern AK (Martin, 1905).
Alaska Southern 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 ([ ]).