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Map showing publication footprint
  • Usage in publication:
    • Lookout Peak tonalite
  • Modifications:
    • Named
  • Dominant lithology:
    • Tonalite
  • AAPG geologic province:
    • Sierra Nevada province
Publication:

Parker, R.B., 1961, Petrology and structural geometry of pre-granitic rocks in the Sierra Nevada, Alpine County, California: Geological Society of America Bulletin, v. 72, no. 12, p. 1789-1806.


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).


Map showing publication footprint
  • Usage in publication:
    • Lookout Peak granodiorite
    • Lookout Peak pluton
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Sierra Nevada province
Publication:

Frei, L.S., 1986, Additional paleomagnetic results from the Sierra Nevada; further constraints on Basin-and-Range extension and northward displacement in the western United States: Geological Society of America Bulletin, v. 97, no. 7, p. 840-849.


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 ([ ]).

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