Advanced Search
Green Valley Tonalite Granodiorite Varity
Field Collector: Esper Signius Larsen Jr.
Place Collected:South of Vista, San Luis Rey Quadrangle, Southern California
Object number: ROC21765
DescriptionSalt and pepper medium grained (1-5 mm) plutonic igneous rock consisting of 46% plagioclase, 31% quartz, 10% perthite and orthoclase (K-feldspar), 8% biotite, 4% amphibole, 2% Fe-Ore (magnetite and/or hematite, and trace amounts of augite according to Larsen (1948).
In Collection(s)