Usage:
Takotna Formation (AK*)
Spelled Tachatna in early reports.
Geologic age:
Middle Devonian*
Type section, locality, area and/or origin of name:
Not stated. Originally named "Tachatna series" by Spurr (1900) for river now referred to as Takotna River in Kuskokwim region, southwestern AK.
AAPG geologic province:
Alaska Southwestern 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 ([ ]).