Usage:
Ledge Sandstone Member of Ivishak Formation of Sadlerochit Group (AK*)
Geologic age:
Early Triassic*
Type section, locality, area and/or origin of name:
Type section: along small eastern tributary of Marsh Creek, north side of Sadlerochit Mountains, Lat. 69 deg. 41 min. N., Long. 144 deg. 50 min. 30 sec. W., northeastern AK (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 ([ ]).