Jarry-Desloges (crater)

Jarry-Desloges Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter).
Dunes on floor of Jarry-Desloges Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter). Note: this is an enlargement of the previous image of Jarry-Desloges Crater.

Jarry-Desloges Crater is an impact crater in the Iapygia quadrangle of Mars, located at 9.5°S latitude and 276.3°W longitude. It is 92.0 km in diameter and was named after René Jarry-Desloges, and the name was approved in 1973.[1]

Pictures show dunes on the floor of the crater; these can be seen in the pictures below; some of them are Barchans. When there are perfect conditions for producing sand dunes, steady wind in one direction and just enough sand, a barchan sand dune forms. Barchans have a gentle slope on the wind side and a much steeper slope on the lee side where horns or a notch often forms.[2] The whole dune may appear to move with the wind. Observing dunes on Mars can tell us how strong the winds are, as well as their direction.

See also

References

  1. ↑ "Gazetteer of Planetary Nomenclature | Jarry-Desloges". usgs.gov. International Astronomical Union. Retrieved 4 March 2015.
  2. ↑ Pye, Kenneth; Haim Tsoar (2008). Aeolian Sand and Sand Dunes. Springer. p. 138. ISBN 9783540859109.
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