Usage:
Sadlerochit Group (AK*)
Subunits:
(alphabetical) --all in AK: Echooka Formation*, Ivishak Formation*, Kavik Shale [not adopted the by USGS].
Geologic age:
Permian to Early Triassic*
Type section, locality, area and/or origin of name:
Type locality: south slope of Sadlerochit Mountains, immediately north of mesa near east end of Ignek Valley [in T. 3 N., R. 26 E., Mount Michelson quadrangle] northeastern AK (Leffingwell, 1919; Detterman and others, 1975).
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).