Recent ice-rich deposits formed at high latitudes on Mars by sublimation of unstable equatorial ice during low obliquity

@article{Levrard2004RecentID,
  title={Recent ice-rich deposits formed at high latitudes on Mars by sublimation of unstable equatorial ice during low obliquity},
  author={Benjamin Levrard and François Forget and Franck Montmessin and Jacques Laskar},
  journal={Nature},
  year={2004},
  volume={431},
  pages={1072-1075}
}
Observations from the gamma-ray spectrometer instrument suite on the Mars Odyssey spacecraft have been interpreted as indicating the presence of vast reservoirs of near-surface ice in high latitudes of both martian hemispheres. Ice concentrations are estimated to range from 70 per cent at 60° latitude to 100 per cent near the poles, possibly overlain by a few centimetres of ice-free material in most places. This result is supported by morphological evidence of metres-thick layered deposits that… 

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