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Rhyolite
Field Collector: Esper Signius Larsen Jr.
Place Collected:Elsinore Quadrangle, Southern California
Object number: El 298
DescriptionVery light grey-almost white volcanic igneous rock. Minerals are not identiiable in hand sample except a homogeneous distribution of very small (0.1 mm) black biotite thruoghout the sample. Based on the color of the sample, it's probably rhyolititc in compostion.
In Collection(s)