112k views
0 votes
Why is one hemisphere of mars believed to be older than the other?

User Nikhil G
by
7.6k points

1 Answer

2 votes
The southern hemisphere is believed to be older because it has more craters. The northern hemisphere consists of plains and is at a lower elevation. There is an abrupt elevation change at the border between the two hemispheres.
User Bryan Schoen
by
8.0k points