Jarry-Desloges (crater)

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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 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.

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References[edit]

  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.