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This specimen is typical of the saturated gabbros of the Adirondacks. The plagioclases are generally in the range of Anâ‚„â‚€ and the orthopyroxenes average close to En₆₀. Antiperthite is locally developed. Scattered grains of ilmenite and garnet…

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OCR PDF of supplemental information for the Panoche Pass, California collection.

Quatz appears strained, microcline is altered to muscovite and sericite, biotite is altered to chlorite

Kingdom: Animalia Phylum: Echinodermata Class: Paracrinoidea Order: Varicata Family: Malocystitidae Genus: Species:

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This sample is mis-labeled as a pegmatite. It is really a porphyritic dike material that cuts through the Zoroaster Granite. The phenocrysts are hornblende.