Photomicrograph of hypersthene andesite, Oregon. 1955.
Dates
Date Taken
1955
Summary
Album caption: Photomicrograph of hypersthene andesite in the Sardine Formtion. Phenocrysts of labradorite and hypersthene are set in a pilotaxitic groundmass. Sample P-55-6 27A. Oregon. circa 1955. Published as figure 22 in U.S. Geological Survey Professional Paper 449. 1964. No index card.
Summary
Album caption: Photomicrograph of hypersthene andesite in the Sardine Formtion. Phenocrysts of labradorite and hypersthene are set in a pilotaxitic groundmass. Sample P-55-6 27A. Oregon. circa 1955.
Published as figure 22 in U.S. Geological Survey Professional Paper 449. 1964.
Available in the U.S. Geological Survey Denver Library Photographic Collection, Peck, D.L. Collection.
Rights
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