Why are there three main types of volcanoes?
Answer to relevant QuestionsBowen’s idea of fractional crystallization of basaltic magma as a means of producing the broad variety of igneous rocks, while certainly a natural and laboratory process, does not completely answer the big picture. Why not?If, as a mafic (basaltic) magma crystallizes (Figs. 3.3 and 3.4) underground, the crystals are removed from contact with the magma, and the remaining magma crystallizes separately, which kind of a rock will form first and ...What kind of igneous rock bodies are the light-colored rocks shown in Fig. 3.7?What coarse-grained (plutonic) rock consists of abundant calcic plagioclase plus olivine and pyroxene?What were the major geologic effects of the May 18, 1980, eruption of Mt. St. Helens in southwestern Washington (Fig. 3.11)?
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