Orbital forcing of the martian polar layered deposits

  title={Orbital forcing of the martian polar layered deposits},
  author={Jacques Laskar and Benjamin Levrard and John F. Mustard},
Since the first images of polar regions on Mars revealed alternating bright and dark layers, there has been speculation that their formation might be tied to the planet's orbital climate forcing. But uncertainties in the deposition timescale exceed two orders of magnitude: estimates based on assumptions of dust deposition, ice formation and sublimation, and their variations with orbital forcing suggest a deposition rate of 10-3 to 10-2 cm yr-1 (refs 5, 6), whereas estimates based on cratering… 

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