Science Question HELP please!?

Question

A geologist studying lava flows in central British Columbia discovers three separate layers of flows. Upon futher analysis, she determines the middle layer of lava has a magnetic orientation exactly opposite the flows above and below it. What can she conclude from the data she has found?

Answer 1

This is a contrived hypothetical question for which there is no rational answer.

Answer 2

I did not study geology this year but i did study physics (i hate) biology and chemistry. It says that they have opposite magnetic forces. You know + and - polls pull to each other. Therefore the lava flows are pulling to each other because where they meet they are opposite polls. Opposites always attract and vice a versa.

Answer 3

She can conclude that the middle flow occurred during a period when the magnetic field was reversed.