Passage Discussion

by **LeonC641** Wed Feb 17, 2021 9:05 pm

Hi there,
I had trouble understanding the argument in Line 34 - 40. First, I don't understand why continental rocks of the same age could have different magnetic fields. If two rocks are of the same age, then they both created at the same time, and hence the same magnetic field, I suppose.

And, how does the fact of different magnetic fields help explain continents indeed drifted? I thought even though the new oceanic plate was indeed proved and thus has spread, but this does not prove anything about the continental plate.

I would really appreciate any help!
Leon