Usage:
Alapah Limestone of Lisburne Group (AK*)
Geologic age:
Middle to Late Mississippian (Visean to Serpukhovian; Meramecian to Chesterian)*
Type section, locality, area and/or origin of name:
Type section (composite): along ridge top of Sugarloaf Hill, on west slope of Mount Wachsmuth, Lat. 68 deg. 19 min. 40 sec. N., Long. 150 deg. 55 min. 15 sec. W., and at west end of North Ridge, Mount Wachsmuth, Lat. 68 deg. 20 min. N., Long. 150 deg. 55 min. 15 sec. W., central Brooks Range, northern AK (Bowsher and Dutro, 1957).
Type locality: on northern part of Mount Wachsmuth, Shainin Lake area, central Brooks Range (Bowsher and Dutro, 1957).
Named from Alapah Creek, which flows into south end of Shainin Lake (Bowsher and Dutro, 1957).
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 ([ ]).