Most volcanism at spreading ridges goes undetected because it ____.
A) is so rare
B) occurs on the ocean floor
C) occurs deep within plutons
D) occurs deep in subduction zones
E) cannot be differentiated from other Earth processes
Correct Answer:
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Q33: Pyroclastic materials _.
A)have low viscosity and a
Q34: A lahar may form when _.
A)lava is
Q35: _ in California is the world's largest
Q36: Most of the world's active volcanoes are
Q37: All volcanoes _.
A)fall into one of five
Q39: A _ is a type of volcano
Q40: Most of the approximately 3,300 historic eruptions
Q41: Why are there volcanoes on the west
Q42: Erupting volcanoes eject pyroclastic materials of varying
Q43: Discuss what volcanologists look for when trying
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