Usage:
Bathtub Graywacke (AK*)
Geologic age:
Early Cretaceous*
Type section, locality, area and/or origin of name:
Type section: exposures in upper Kongakut River area, 0.8 km west of type section for Kongakut Formation on north flank of Bathtub Ridge, Lat. 69 deg. 05 min. 30 sec. to 69 deg. 06 min. 15 sec. N., Long. 142 deg. 18 min. 00 sec. W., Demarcation Point quadrangle, AK. Named from Bathtub Ridge (Detterman and others, 1975).
Reference section: along Sabbath Creek, Lat. 69 deg. 37 min. to 69 deg. 41 min. N., Long. 143 deg. 30 min. to 143 deg. 33 min. W. (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 ([ ]).