Category:Scalloped topography

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Scalloped topography is common in the mid-latitudes of Mars, between 45° and 60° north and south. It is particularly prominent in the region of Utopia Planitia,[1] [2] in the northern hemisphere, and in the region of Peneus Patera|Peneus and Amphitrites Paterae[3] [4] in the southern hemisphere. Such topography consists of shallow, rimless depressions with scalloped edges, commonly referred to as "scalloped depressions" or simply "scallops". Scalloped depressions can be isolated or clustered and sometimes seem to coalesce. A typical scalloped depression displays a gentle equator-facing slope and a steeper pole-facing scarp.[5] Scalloped depressions are believed to form from the removal of subsurface material, possibly interstitial ice, by Sublimation (chemistry)|sublimation (direct transition of a material from the solid to the gas phase with no intermediate liquid stage). This process may still be happening at present.[6] This topography may be of great importance for future colonization of Mars because it may point to deposits of pure ice.[7]

References

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  1. ↑ (2009). "HiRISE observations of periglacial landforms in Utopia Planitia". Journal of Geophysical Research 114: E04005. DOI:10.1029/2008JE003264.
  2. ↑ Morgenstern A, Hauber E, Reiss D, van Gasselt S, Grosse G, Schirrmeister L (2007): Deposition and degradation of a volatile-rich layer in Utopia Planitia, and implications for climate history on Mars. Journal of Geophysical Research: Planets 112, E06010.
  3. ↑ (2009). "Scalloped terrains in the Peneus and Amphitrites Paterae region of Mars as observed by HiRISE". Icarus 205: 259–268. DOI:10.1016/j.icarus.2009.06.005.
  4. ↑ Zanetti, M., Hiesinger,H., Reiss, D., Hauber, E. and Neukum, G. (2009), "Scalloped Depression Development on Malea Planum and the Southern Wall of the Hellas Basin, Mars", 40th Lunar and Planetary Science Conference, abstract 2178
  5. ↑ http://www.uahirise.org/ESP_038821_1235
  6. ↑ Scalloped Topography in Peneus Patera Crater. HiRISE Operations Center (2007-02-28). Retrieved on 2014-11-24.
  7. ↑ (2015). "Modeling the development of martian sublimation thermokarst landforms". Icarus 262: 154–169. DOI:10.1016/j.icarus.2015.07.033.

Media in category "Scalloped topography"

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