Table Anomaly III
Anomaly IV
Anomaly I
Anomaly II
Pacific-Nazca Plates
(Use line B)
Measured distance from
oceanic ridge across anomaly
on the map (cm)
Scale conversion distance
from oceanic ridge across
anomaly (km)
Scale distance from oceanic
ridge across anomaly
converted to cm
Age (years)
5,000,000 yrs
10,000,000 yrs
15,000,000 yrs
20,000,000 yrs
Average Seafloor Spreading
Rate (cm/yr)