Topography and Stratigraphy of the Polar Layered Deposits on Mars

Details Topography and Stratigraphy of the Polar Layered Deposits on Mars Topography and Stratigraphy of the Polar Layered Deposits on Mars

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mpse.conf...74h&link_type=abstract

International Conference on Mars Polar Science and Exploration, p. 74

Computer Science

Mars (Planet), Mars Environment, Mars Surface, Climate Change, Geochronology, Deposits, Stratigraphy, Polar Regions, Mars Photographs, Viking Orbiter Spacecraft, Ice, Mars Climate Orbiter

Scientific paper

The martian polar layered deposits (PLD) are probably the best source of information about the recent climate history of Mars, but their origin and the mechanisms of accumulation are still a mystery. The polar layers are sedimentary deposits that most planetary scientists believe are composed of water ice and varying amounts of wind-blown dust, but their composition is poorly constrained. Because climate changes are likely recorded as variations in composition or deposition/erosion rates between layers, the detailed stratigraphy of the PLD is of great interest. Layer thicknesses of approx. 10 to 50 m were observed in Viking Orbiter images of the north PLD by Blasius et al. and recent Mars Orbiter Camera (MOC) images resolve layers with similar or lesser thicknesses. In order to accurately determine the thickness of layers and interpret PLD stratigraphy, the topography of exposures must be known. Here we describe preliminary results of a study to evaluate the topography and stratigraphy of the PLD using photoclinometry on MOC images. Additional information is contained in the original extended abstract.

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