U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Sadlerochit

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 ([ ]).