It is diverse, and different parts formed at different times.
Explanation:
As can be seen in the question, the geology of Marx is complex: with the North of the planet being of volcanic origin, and older in age, and the South of the planet being of younger origin, and consisting mostly of felsic rock.
Both time and geological composition differ depending on the region of Mars we are located in, and for that reason, we can say that the geology of Mars is very diverse.