How can you tell from the apparent polar wandering curves for Eurasia and North America, when they were last together and had just started to drift apart?
A) more than 500 million years ago, because the curves are separated then
B) just recently, when the curves came together
C) about 300 million years ago, because the curves really bend before that
D) about 200 million years ago because, for times older than that, their curves remain parallel and about the same distance apart

Question

Quizplus · Accepted Answer

The apparent polar wandering curves for Eurasia and North America show that these continents were last together and began to drift apart about 200 million years ago. This is indicated by the fact that, for times older than 200 million years, their curves remain parallel and about the same distance apart, suggesting they were moving together as part of a larger landmass (Pangaea) before beginning to separate.

How Can You Tell from the Apparent Polar Wandering Curves