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San Marcos Gabbro with Coarse Hornblende
Field Collector: Esper Signius Larsen Jr.
Place Collected:On Menifee Mountain Elsinore Quadrangle, Southern California
Object number: ROC21757
DescriptionBlack, white, and rust coarse-grained plutonic rock with large black (1-3 cm) hornblende in a matrix(?) of white crusty plagioclase in roughly equal proportions.
In Collection(s)