Part 2 calculation of plate movement look at the map of the age of the seafloor in figure 2.17 of "earth science" from your initial observation, do you think the mid-atlantic ridge is spreading faster or slower than the east pacific rise? explain why you think this. looking at the north what age is the seafloor immediately off the coast of nyc? using the ruler tool in google earth, what is the shortest distance (in km) of the edge of the continental shelf off nyc to the mid-atlantic ridge? using the equation rate distance / time, how fast had north america moved away from the mid-atlantic ridge (in cm/year)? heb looking at the east south america is moving away from the east pacific rise at approximately 8.6 cm/year. do these rates agree with your initial assumption? explain why.