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Geology of Mount Shasta

Figure 5d

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Figure 5d: Hand sample and thin section photographs of a dacite from Shastina. The sample was collected from pyroclastic flow deposits near Weed, and contains phenocrysts of hornblende (Hb), plagioclase (Pl), and both hypersthene and augite (Px). Thin section field of view is 5 millimeters wide.

 

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