Problem: The Walvis Ridge islands and seamounts formed at the Tristan Hot Spot. It is shown on the map below. Assume the hot spot is 0 Ma and the northern end of the chain is 78 Ma (as shown on the map below). They are 1878 km apart along the yellow line. How fast is the plate moving over the Tristan Hot Spot in cm/year? (Remember, there are 100,000 cm in 1 km and Ma = millions of years)