A revised surface age for the North Polar Layered Deposits of Mars

Margaret E. Landis, Shane Byrne, Ingrid J. Daubar, Kenneth E. Herkenhoff, Colin M. Dundas

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


The North Polar Layered Deposits (NPLD) of Mars contain a complex stratigraphy that has been suggested to retain a record of past eccentricity- and obliquity-forced climate changes. The surface accumulation rate in the current climate can be constrained by the crater retention age. We scale NPLD crater diameters to account for icy target strength and compare surface age using a new production function for recent small impacts on Mars to the previously used model of Hartmann (2005). Our results indicate that ice is accumulating in these craters several times faster than previously thought, with a 100 m diameter crater being completely infilled within centuries. Craters appear to have a diameter-dependent lifetime, but the data also permit a complete resurfacing of the NPLD at ∼1.5 ka.

Original languageEnglish (US)
Pages (from-to)3060-3068
Number of pages9
JournalGeophysical Research Letters
Issue number7
StatePublished - Apr 16 2016


  • impact crater statistics
  • impact craters
  • Mars polar science
  • North Polar Layered Deposits, Mars
  • spacecraft observations

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)


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