When magma cools so quickly that crystallization cannot take place it produces ________.
A) aa lava
B) granite
C) metamorphic rock
D) obsidian
E) pahoehoe
Correct Answer:
Verified
Q1: The viscosity of magma is lowered by
Q4: Spreading centres are an ideal location for
Q5: Slow flowing,more viscous lava commonly has a
Q6: The presence of water _ the melting
Q7: Why does the magma from some volcanoes
Q8: Silicon and oxygen link up to form
Q9: The volcanic explosivity index (VEI)measures size of
Q10: Rock may melt by _.
A) lowering the
Q14: The dominant volcanic gas (commonly 90% or
Q16: A shield volcano has a great _.
A)height
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