A distinct area of unusually jumbled,hilly terrain has been found on Mercury.This terrain was formed by
A) upwelling of magma while Mercury was still hot enough for its mantle to be tectonically active.
B) the impact of a large comet.
C) an intense shower of meteoroids near the end of the heavy bombardment era.
D) the focusing of seismic waves generated by the Caloris impact.

Question

Quizplus · Accepted Answer

The jumbled, hilly terrain on Mercury was formed as a result of the focusing of seismic waves generated by the Caloris impact. This impact was so powerful that it sent seismic waves through the planet, which then focused on the opposite side, creating the chaotic terrain observed.

A Distinct Area of Unusually Jumbled,hilly Terrain Has Been Found