Chapter 18, Problem 9PEA

To determine

The rate of ridge’s seafloor spreading in the following table details the measurement of the distance from a mid-oceanic ridge's axis to the reversal event.

Magnetic polarity	Reversal event age ( ${10}^6$ years )	Distance from ridge axis to reversal episode ( $\text{km}$)
Normal	$0.7$	$14$
Reverse	$0.85$	$18$
Normal	$1$	$19$
Reverse	$1.8$	$35$
Normal	$2.0$	$43$