Usage:
Tyonek Formation of Kenai Group (AK*)
Subunits:
(alphabetical) --all in AK: Bell Island Sandstone Member, Chuitna Member*.
Geologic age:
Tertiary
Oligocene, early*
through
Miocene, middle*
Type section, locality, area and/or origin of name:
Type section (subsurface): Pan American Petroleum Corp. Tyonek 17587 No. 2 well, in sec. 30, T. 11 N., R. 11 W., Seward Meridian, Cook Inlet, southern AK (Calderwood and Fackler, 1972).
AAPG geologic province:
Alaska Southern 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 ([ ]).