Usage:
Sag River Formation (AK)
Sag River Sandstone (AK*)
[?] Sag River Formation of Prudhoe Bay Group (AK-recognized locally in subsurface of Prudhoe Bay oil field)
Geologic age:
Triassic, Late
Jurassic, Early
Type section, locality, area and/or origin of name:
Type section (subsurface) [partial]: Sag River State No. 1 well, Prudhoe Bay oil field, in sec. 4, T. 10 N., R. 15 E., U.P.M., North Slope, AK (Fackler and others, 1970).
Reference section (subsurface) [partial]: depth-interval 8,117 to 8,163 ft, Prudhoe Bay State No.1 well, in sec. 10, T. 11 N., R. 14 E., U.P.M. (Fackler and others, 1970).
Reference section (subsurface): depth-interval 8,555 to 8,591 ft, BP 21-11-13 well, Prudhoe Bay oil field, in sec. 21, T. 11 N., R. 13 E., U.P.M., North Slope, AK (Jones and Speers, 1976).
Name Sag River is an abbreviation of nearby Sagavanirktok River (W.P. Brosge, oral commun., 1970).
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 ([ ]).