MATCHING (01-21) 01-04: Match the magma or the pictures of volcanoes with the as
ID: 120082 • Letter: M
Question
MATCHING (01-21) 01-04: Match the magma or the pictures of volcanoes with the associated statements below a. Felsic magma b. Left picture c. Intermediate magma d. Middle picture e. Mafic magma f. Right picture Which magma has the closest chemical composition as the material in the asthenosphere? Which magma would be most likely to produce composite volcanoes, such as the volcanoes of the 1. 2. Andes and Mt. St. Helens, following the subduction of oceanic crust under continental crust? Which of the 3 volcanoes in the pictures would have the least violent eruptions? Which of the 3 volcanoes in the pictures is composed of only pyroclastic (ash& cinders) material? 3. 4.Explanation / Answer
1. E. Mafic magma has the similar chemical composition like that of the asthenosphere. It contains magnesium and iron in it.
2. C. Intermediate magma has some lesser percentage of silica in it and they form cmposite volcanoes.
3. D. The island in the center has les eruption as it is a dormant island.
4. F. The right picture has only pyroclastic materials. This is a composite volcano.
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