At convergent plate boundaries, more viscous magmas, usually of felsic composition, are emplaced as ____, thus accounting for the explosive eruptions that typically occur there.
A) supervolcanoes
B) plutons
C) fissures
D) lava domes
E) cinder cones
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Q19: The dominant gas emitted from volcanoes is
Q20: Earth is the most volcanically active body
Q21: Calderas are formed when _.
A)low-viscosity magma flows
Q22: What are the criteria used by geologists
Q23: A dense cloud of pyroclastic materials and
Q25: Basalt plateaus erupt from _.
A)supervolcanoes
B)shield volcanoes
C)fissures
D)lava domes
E)cinder
Q26: Cinder cones _.
A)are large, gently sloped volcanoes
B)often
Q27: Lava domes form from _.
A)mafic and intermediate
Q28: Nearly all remaining active volcanoes _.
A)are at
Q29: The Hawaiian islands formed via _ volcanism.
A)subduction
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