What were the major geologic effects of the May 18, 1980, eruption of Mt. St. Helens in southwestern Washington (Fig. 3.11)?
Answer to relevant QuestionsNote the similarities in the sketches of Mt. St. Helens (Fig. 3.11) and Crater Lake, Oregon (Fig. 3.12). Surmise how Crater Lake may have formed.Figure 3.16 includes three sketches of the Hawaiian Islands. (a) What is the origin of the islands? They are volcanoesWhat are the agents of mechanical weatheringWhich minerals does the chemical weathering process called oxidation affect most readily?Are all the ions listed in the previous problem carried away to the ocean and hence lost to the soil?
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