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Question

In some eruptions, mud flows are forced over the ________.
  1. earth's mantle
  2. ocean bed
  3. earth's surface
  4. earth's core

A
ocean bed
B
earth's mantle
C
earth's surface
D
earth's core
Solution
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Mud flows are a flowage of water-saturated earth material possessing a high degree of fluidity during movement. A less-saturated flowing mass is often called a debris flow. A mudflow originating on the flank of a volcano which generally flows through the surface of the Earth.

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