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- Usage in publication:
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- Lookout Peak tonalite
- Modifications:
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- Named
- Dominant lithology:
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- Tonalite
- AAPG geologic province:
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- Sierra Nevada province
Summary:
Shown in geologic sketch map of western half of Markleeville 15-min quadrangle, Alpine Co., CA, in southern part of quadrangle. [Age not stated.]
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
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- Lookout Peak granodiorite
- Lookout Peak pluton
- Modifications:
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- Geochronologic dating
- AAPG geologic province:
-
- Sierra Nevada province
Summary:
U-Pb age of Lookout Peak pluton suggest 97 Ma as emplacement age (Chen and Moore, 1982, p. 4775). Intrudes Lightning Creek pluton. [Based on U.S. Geological Survey Geologic Time Chart, 1986, age is Late 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 ([ ]).