- Usage in publication:
-
- Dinkey Creek Granodiorite*
- Modifications:
-
- Named
- Geochronologic dating
- Dominant lithology:
-
- Granodiorite
- Tonalite
- AAPG geologic province:
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- Sierra Nevada province
Summary:
Named for Dinkey Creek. Type locality is S shore of Shaver Lake [37 deg 08'40"N, 119 deg 18'09"W, Fresno Co, CA]. Is unit of Shaver Intrusive Suite (new). Called granodiorite of Dinkey Creek (Bateman and others, 1984). Ranges in composition from tonalite to granite; consists of 2 facies, equigranular and megacrystic. Intrudes Bass Lake Tonalite and is intruded by younger units of Shaver Intrusive Suite and by Mount Givens Granodiorite and other units of John Muir Intrusive Suite (new). K-Ar ages range from 101 to 80 Ma on hornblende and from 94 to 78 Ma on biotite (Bateman and Lockwood, 1976; Bateman and Womes, 1972a,b; Kistler and others, 1965). U-Pb age on zircon is 104 Ma (Stern and others, 1981). Age is Early Cretaceous.
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 ([ ]).