One approach to understanding the nature and origin of the fundamental crustal dichotomy on Mars is to attempt to unravel the complex history of the boundary transition zone between the cratered highlands and northern lowland plains. This is an area in which resurfacing events have played a major role, and the cumulative frequency curves for impact craters larger than 5 km diameter within the transition zone and for the adjacent cratered terrain and smooth plains all show evidence of such resurfacing. The authors present evidence for a widespread, common-age resurfacing that affected the entire region and that may have been contemporaneous with other major events elsewhere on Mars. The sequence of major resurfacing events that these data imply are used to constrain the history of the region and some implications of these results for the origin of the crustal dichotomy are discussed.
Lunar and Planetary Science Conference Proceedings
- Pub Date:
- Mars Craters;
- Mars Surface;
- Curve Fitting;
- Lunar and Planetary Exploration; Mars;
- Mars Surface:History