According to the supercontinent model, ____.
A) at some future time, all continents will join together in a single supercontinent, and tectonic activity will cease
B) continental fragments have migrated around the globe and reassembled as a supercontinent at least three times in Earth's history
C) the breakup of a future supercontinent will lead to the destruction of all continental crust in subduction zones
D) all the geologic areas within a supercontinent have the same radiometric age

Question

Quizplus · Accepted Answer

The supercontinent model proposes that continental fragments have migrated around the globe and reassembled as a supercontinent at least three times in Earth's history. This is supported by evidence such as the fit of the continents, similarities in rock types and structures across different continents, and paleomagnetic data. The model does not suggest that tectonic activity will cease or that all geologic areas within a supercontinent have the same radiometric age. While the breakup of a future supercontinent would indeed involve subduction zones, it would not necessarily lead to the destruction of all continental crust.

According to the Supercontinent Model, ____