- Usage in publication:
-
- Duffey Dome Formation*
- Modifications:
-
- Named
- Dominant lithology:
-
- Metavolcanics
- AAPG geologic province:
-
- Sierra Nevada province
Summary:
Type section designated as exposures near Duffey Dome, sec.16 T23N R6E, Pulga 15' quad, Plumas Co, CA. Reference section through southern part of unit is exposed along road to Bear Ranch Hill, secs.19 and 30 T23N R6E. Various lithologies, shown separately on geologic map of Pulga 15' quad, Plumas and Butte Cos, include metabasalt, metarhyolite, metatuff, quartzite and metachert, phyllite, and marble. Color varies from dark-greenish-gray to white to light-gray. Is over 400 m thick. Forms east-west-trending belt south of Bucks Lake and Grizzly plutons. In south bordered by serpentine. In east unit wraps around Granite Basin pluton. Duffey Dome Formation is believed to be of Paleozoic(?) age, younger than Franklin Canyon Formation and presumably underlies Horseshoe Bend Formation.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Duffey Dome Formationâ€
- Modifications:
-
- Abandoned
- AAPG geologic province:
-
- Sierra Nevada province
Summary:
Duffey Dome Formation of Hietanen (1973) is abandoned; its rocks are assigned to west end of Franklin Canyon Formation.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
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 ([ ]).