Why are the summits of Mount Vsevidof and Crater Mountain so different? (Hint: Contrast the formation of each.)
Look at the following volcanoes (note that the maps are of several different scales):
• Mount Vsevidof (53°07'35"N, 168°41'16"W), a composite volcano in Alaska (shown on Map T-2, Map T-21b, and Figure 34-2)
• Crater Mountain (37°52'42"N, 119°00'25"W), the highest peak of the Mono Craters, a chain of rhyolitic plug dome volcanoes in California (shown on Maps T-23a and T-23c)
• SP Mountain (35°34'56"N, 111°37'55"W), a basaltic cinder cone in Arizona (shown on Maps T-22a and T-22b and Figure 34-3)
• Mauna Loa (19°28'17"N, 155°35'41"W), a large shield volcano on the Big Island of Hawai‘i (shown on Maps T-1 and T-21a)
What will be an ideal response?
Pyroclastics ejected from Mt. Vsevidof helped form the symmetrical shape and the summit crater; very viscous lava pushed up to form the irregular summit of Crater Mountain.
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