Rubideaux Coarse Leucogranite
Field Collector: Esper Signius Larsen Jr.
Place Collected:Mt. Rubideaux Riverside Elsinore Quadrangle Southern California
Object number: ROC21691
DescriptionYellow-grey with black specks coarse-grained plutonic rock consisting of 33% yellow-grey quartz, 32% K-feldspar in the form of microperthite, 34% grey plagioclase, 2% black biotite, 1% black hornblende, and 0.5% orthopyroxene according to Larsen (1948).