Domengioni Valley Granodiorite
Field Collector: Esper Signius Larsen Jr.
Place Collected:Double Butte near Homeland, CA, Elsinore Quadrangle
Object number: ROC21705
DescriptionPlutonic, medium-grained (1-5 mm) igneous rock that is light grey on a fresh surface with ~10% black mineral flecks and clusters and some rust color on a weathered surface. Consists of 50% light grey plagioclase, 30% light grey quartz, 10% K-feldspar, 10% black biotite.