Rifting is the first step in plate tectonics, the beginning of plate formation. The process seems to have started on Mars, but the planet cooled too much to have the active plate movements we know as earthquakes and volcanic eruptions.
At first, scientists believed the features might be deep cracks, caused by crustal rifting or tectonic processes.
It has a great canyon (perhaps carved by comet impact, perhaps by rifting) with features attributed to flowing water, and also a moderate magnetic field which seems to originate fairly close to the surface.
The Stirling Range or Koikyennuruff is a range of mountains and hills in the Great Southern region of Western Australia, 337 km south-east of Perth, Western Australia....
with the rifting from Antarctica
Antarctica ...
 See also: Earth, Planet, Crust, Field, Light
  
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