Usage:
Carbonado Formation of Puget Group (WA*)
Carbonado Formation (WA)
Geologic age:
early Tertiary (middle Eocene)*
Type section, locality, area and/or origin of name:
Reference locality: west of Carbonado along Carbon River Canyon, in secs. 4 and 5, T. 18 N., R. 6 E., and in secs. 31 and 32, T. 19 N., R. 6 E., Pierce Co., WA (Gard, 1968).
AAPG geologic province:
Puget Sound province*
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 ([ ]).