GEOLEX

Summary of Citation: Ebbetts Pass

Publication:
Wilshire, H.G., 1957, Propylitization of Tertiary volcanic rocks
   near Ebbetts Pass, Alpine County, California: University of
   California Publications in Geological Sciences, v. 32, no.
   4, p. 243-271

Usage in Publication:
Ebbetts Pass granodiorite

Modifications:	Geologic Province:	Dominant Lithology:
Named	Sierra Nevada province	Granodiorite

Summary:
Shown on geologic sketch map of Ebbetts Pass region, Alpine Co, CA. Age given as pre-Tertiary.

Summary of Citation: Ebbetts Pass

Publication:
Robinson, A.C. and Kistler, R.W., 1986, Maps showing isotopic
   dating in the Walker Lake 1 degrees x 2 degrees quadrangle,
   California and Nevada: U.S. Geological Survey Miscellaneous
   Field Studies Map, MF-1382-N, 49 p., 1 sheet, scale
   1:125,000

Usage in Publication:
Ebbetts Pass Granodiorite*

Modifications:	Geologic Province:	Dominant Lithology:
Isotopic dating	Sierra Nevada province

Summary:
K-Ar age on biotite from Ebbetts Pass Granodiorite yielded 88.3 +/-1.0 Ma; sample collected 38 deg 38' 00"N, 119 deg 56' 22"W. K-Ar age on hornblende yielded 94.6 +/-2.0 Ma; sample collected at 38 deg 31' 42"N, 119 deg 54' 10"W. [Based on U.S. Geological Survey Geologic Time Chart, 1986 age is Late Cretaceous]