What Observation Supports the Hypothesis That the Slab-Pull Force Is

question 47

Multiple Choice

What observation supports the hypothesis that the slab-pull force is the primary cause of plate motion?

• A) Divergent plate boundaries represent all of the upwelling expected by mantle convection.
• B) Plumes are the deep upwelling component of convection with seismically slow velocities.
• C) Earthquakes and volcanoes are concentrated at plate boundaries.
• D) Plates with long subduction zones move faster than plates with short subduction-zones.

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