  The Martian obliquity cycle is predominately influenced by Solar and Jovian
tidal forces. The present-day axial tilt of Mars (25 degrees) is predicted to
cycle between 0 degrees and 60 degrees (Mischna & Richardson 2005) with
excursions up to 80 degrees(Laskar et al. 2004). We focused on Arabia Terra, a
region especially well-suited for studying glacial migration due to its
location in the northern mid-latitude (20-40 degrees North, 0-30 degrees East)
zone, and its heavily cratered terrain. We created glacial and fluvial
morphology distribution maps with the ESRI Aeronautical Reconnaissance Coverage
Geographic Information System (ArcGIS). We determined the ages of our craters
in order to establish a time-domain link between the Martian obliquity cycle
and glacial migration; we found the average crater age to be roughly 2 billion
years old.

Earth and Planetary Astrophysics