Volcano A erupts rocks with SiO2 content ranging from 49% to 52% whereas volcano B, 100km away, erupts materials with SiO2 content of 62-68%. Which statement best characterizes these two volcanos?
A) Volcano A is probably a shield volcano with typically quiescent eruptions, whereas Volcano B is likely a stratovolcano characterized by violent, explosive eruptions.
B) Both volcanos are violent, explosive volcanos that spread ash continent wide.
C) Volcano A is likely to be a supervolcano with violent eruptions, whereas volcano B is probably a shield volcano with quiescent eruptions.
D) Both volcanos are shield type volcanos that are characterized by quiescent eruptions.
A
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