The rate of seafloor spreading exactly matches the rate of
A) subduction.
B) ocean subsidence.
C) seafloor erosion.
D) magnetic declination.

Question

Quizplus · Accepted Answer

Seafloor spreading occurs at mid-oceanic ridges where two tectonic plates are moving away from each other. The rate of seafloor spreading is equal to the rate of subduction at convergent plate boundaries where one plate is being forced underneath another. This maintains the overall size of the ocean basins and prevents them from expanding or contracting significantly. Choices B and C are not related to seafloor spreading, and choice D refers to the angle between magnetic north and true north, which is not directly related to seafloor spreading rates.

The Rate of Seafloor Spreading Exactly Matches the Rate of