Answer: Sea-floor spreading — In the early 1960s, Princeton geologist Harry Hess proposed the hypothesis of sea-floor spreading, in which basaltic magma from the mantle rises to create new ocean floor at mid-ocean ridges. ... A test of the hypothesis of sea-floor spreading was provided by studies of the Earth's magnetism.
Answer:
Ok. I. Will. Try. And. Find. The. Answer
Explanation:
Yes. 12 is between 8 and 20. The 45° W doesn't matter in this situation.
