As compared to a slowly spreading mid-ocean ridge,a rapidly spreading ridge is ____________.
A) wider
B) narrower
C) more silicic in lava composition

Question

As compared to a slowly spreading mid-ocean ridge,a rapidly spreading ridge is ____________. 
A) wider 
B) narrower 
C) more silicic in lava composition

Quizplus · Accepted Answer

A rapidly spreading ridge is wider than a slowly spreading mid-ocean ridge due to the increased rate of volcanic activity and faster divergence of the tectonic plates. The faster spreading rate also results in a generally more mafic lava composition, rather than a more silicic composition. Therefore, choices B and C are incorrect.

As Compared to a Slowly Spreading Mid-Ocean Ridge,a Rapidly Spreading