Encyclopedia of Planetary Landforms

2015 Edition
| Editors: Henrik Hargitai, Ákos Kereszturi

Softened Terrain (Mars)

Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-3134-3_587

Definition

Terrain displaying rounded and subdued topography.

Subtypes

“Softened terrain” may refer to (Kreslavsky et al. 2008):
  1. (1)

    The soft appearance of topographic features at high latitudes on Mars, caused by smoothing of topography with a characteristic vertical scale on the order of several meter(s). Terrain softening affects all types of landforms, but it is particularly evident on  softened craters (Fig. 1). It is characterized with broad slope inflections and convex slope segments (Squyres et al. 1992, p. 543).

     
  2. (2)

    Latitude-dependent trends in crater depth, concentric crater infill, etc., related to creep of a hundreds-of-meters-thick layer ( lineated valley fill).

     
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References

  1. Jankowski DG, Squyres SW (1992) The topography of impact craters in “softened” terrain on Mars. Icarus 100(1):26–39CrossRefGoogle Scholar
  2. Kreslavsky MA, Head J, Marchant DR (2008) Periods of active permafrost layer formation during the geological history of Mars: implications for circum-polar and mid-latitude surface processes. Planet Space Sci 56:289–302CrossRefGoogle Scholar
  3. Soderblom LA, Kreidler TJ, Masursky H (1973) Latitudinal distribution of a debris mantle on the Martian surface. J Geophys Res 78:4117–4122CrossRefGoogle Scholar
  4. Squyres SW, Carr MH (1986) Geomorphic evidence for the distribution of ground ice on Mars. Science 231:249–252CrossRefGoogle Scholar
  5. Squyres SW, Clifford SM, Kuzmin RO, Zimbelman JR, Costard FM (1992) Ice in the Martian regolith. In: Kieffer HH (ed) Mars. University of Arizona Press, Arizona, 1498 ppGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.NASA Ames Research Center/NPPMoffett FieldUSA
  2. 2.Konkoly Thege Miklos Astronomical InstituteResearch Centre for Astronomy and Earth SciencesBudapestHungary