What kind of magma is dominantly produced at spreading ridges?
A) rhyolite
B) basalt
C) dacite
D) andesite
E) tephra
Correct Answer:
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Q20: Which of the following volcanic hazards can
Q21: The most lethal volcanic phenomena (responsible for
Q22: The interaction between magma and groundwater produces
Q23: Approximately how many people live in close
Q24: Which of the following is a stratovolcano
Q26: What feature is caused by the collapse
Q27: Which of the following is usually the
Q28: Basaltic eruptions
A) tend to have low viscosity.
B)
Q29: What process causes melting of rocks in
Q30: Dacitic and andesitic eruptions
A) are commonly explosive.
B)
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