Usage:
Chisana Formation (AK*)
Geologic age:
Early Cretaceous*
Type section, locality, area and/or origin of name:
Type section: lower part in valley of Bonanza Creek, in secs. 25, 35, and 36, T. 4 N., R. 19 E.; upper part in valley of Toby Creek, in secs. 28, 33, and 34, T. 4 N., R. 20 E., Nabesna A-2 quadrangle (scale 1:63,360), southern AK. Named from nearby settlement of Chisana in southeastern part of Nabesna A-3 quadrangle (scale 1:63,360) (Richter and Jones, 1973).
AAPG geologic province:
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).