Return to Figure 5

Geology of Mount Shasta

Figure 5c

Return to Mount Shasta home page
Figure 5c: Hand sample photograph of an andesite from ancestral Mount Shasta and sketch of a thin section of an andesite from Mount Jefferson, Oregon that has a similar phenocryst assemblage (McBirney, 1968). The hand sample was collected from from an outcrop along the Everitt Memorial Highway. Both rocks contain abundant phenocrysts of hypersthene (Px) and plagioclase (Pl).

Geology ~ Environment ~ Native Americans ~ Folklore ~ History ~ Art ~ Literature
Recreation ~ Maps ~ Mount Shasta Collection ~ Bibliography ~ Lesson Plans ~ About Project