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Tonalite
Field Collector: Esper Signius Larsen Jr.
Place Collected:Corona Quadrangle, Southern California
Object number: ROC21786
DescriptionTonalite consisting mostly of off white euhedral plagioclase and lesser amounts of anheral quartz in a grey-green epidote-amphibole matrix with minor amounts of microcline. Plagiocalse and quartz are 0.5 cm in size.
In Collection(s)