Seafloor spreading rates can be estimated if the geologic ages of the magnetic field reversals are independently known.

Question

Quizplus · Accepted Answer

This is known as the "magnetic reversal chronology" and is a commonly used method for estimating seafloor spreading rates. By studying the changes in Earth's magnetic field recorded in rocks on the ocean floor, scientists can determine the age of the rock and thus estimate the rate at which new crust is being formed.

Seafloor Spreading Rates Can Be Estimated If the Geologic Ages