Stratigraphy of the north polar layered deposits of Mars from high-resolution topography

Patricio Becerra, Shane Byrne, Michael M. Sori, Sarah Sutton, Kenneth E. Herkenhoff

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The stratigraphy of the layered deposits in the polar regions of Mars is theorized to contain a record of recent climate change linked to insolation changes driven by variations in the planet's orbital and rotational parameters. In order to confidently link stratigraphic signals to insolation periodicities, a description of the stratigraphy is required based on quantities that directly relate to intrinsic properties of the layers. We use stereo digital terrain models (DTMs) from the High Resolution Imaging Science Experiment to derive a characteristic of north polar layered deposit (NPLD) strata that can be correlated over large distances: the topographic protrusion of layers exposed in troughs, which is a proxy for the layers' resistance to erosion. Using a combination of image analysis and a signal-matching algorithm to correlate continuous depth-protrusion signals taken from DTMs at different locations, we construct a stratigraphic column that describes the upper ~500 m of at least 7% of the area of the NPLD and find accumulation rates that vary by factors of up to 2. We find that, when coupled with observations of exposed layers in images, the topographic expression of the strata is consistently continuous across large distances in the top 300–500 m of the NPLD, suggesting that it is better related to intrinsic layer properties than the brightness of exposed layers alone.

Original languageEnglish (US)
Pages (from-to)1445-1471
Number of pages27
JournalJournal of Geophysical Research E: Planets
Volume121
Issue number8
DOIs
StatePublished - Aug 1 2016

Fingerprint

Stratigraphy
stratigraphy
mars
Topography
topography
Mars
solar radiation
Deposits
deposits
image analysis
Polar Regions
Incident solar radiation
high resolution
periodicity
insolation
digital terrain model
climate change
strata
Planets
Climate change

Keywords

  • digital terrain models
  • HiRISE
  • Mars
  • polar
  • stratigraphy

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Stratigraphy of the north polar layered deposits of Mars from high-resolution topography. / Becerra, Patricio; Byrne, Shane; Sori, Michael M.; Sutton, Sarah; Herkenhoff, Kenneth E.

In: Journal of Geophysical Research E: Planets, Vol. 121, No. 8, 01.08.2016, p. 1445-1471.

Research output: Contribution to journalArticle

Becerra, Patricio ; Byrne, Shane ; Sori, Michael M. ; Sutton, Sarah ; Herkenhoff, Kenneth E. / Stratigraphy of the north polar layered deposits of Mars from high-resolution topography. In: Journal of Geophysical Research E: Planets. 2016 ; Vol. 121, No. 8. pp. 1445-1471.
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