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

Abstract

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
Volume43
Issue number7
DOIs
StatePublished - Apr 16 2016

Keywords

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

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Fingerprint

Dive into the research topics of 'A revised surface age for the North Polar Layered Deposits of Mars'. Together they form a unique fingerprint.

Cite this