Elysium Planitia

Elysium Planitia

MOLA topographical map of Elysium Planitia.
Coordinates	3°00′N 154°42′E / 3.0°N 154.7°ECoordinates: 3°00′N 154°42′E / 3.0°N 154.7°E

Elysium Planitia, located in the Elysium and Aeolis quadrangles, is a broad plain that straddles the equator of Mars, centered at 3°00′N 154°42′E / 3.0°N 154.7°E.^[1] It lies to the south of the volcanic province of Elysium, the second largest volcanic region on the planet, after Tharsis.

The largest craters in this Elysium Planitia are Eddie, Lockyer, and Tombaugh. Elysium contains major volcanoes named Elysium Mons and Albor Tholus and river valleys--one of which, Athabasca Valles may be one of the youngest on Mars. On the east side is an elongated depression called Orcus Patera.

A 2005 photo of a locale within Elysium Planitia at 5° N, 150° E by the Mars Express spacecraft shows what may be ash-covered water ice. The volume of ice is estimated to be 800 km (500 mi) by 900 km (560 mi) in size and 45 m (148 ft) deep, similar in size and depth to the North Sea.^[2] The ice is thought to be the remains of water floods from the Cerberus Fossae fissures about 2 to 10 million years ago. The surface of the area is broken into 'plates' like broken ice floating on a lake. Impact crater counts show that the plates are up to 1 million years older than the gap material, showing that the area solidified much too slowly for the material to be basaltic lava.^[3]

The InSight mission is expected to land on Elysium Planitia in November 2018.^[4]

Gallery

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  MOLA map showing boundaries of Elysium Planitia and other nearby regions.

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  Layers around streamlined knob, as seen by HiRISE under HiWish program.

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  Mounds with layers, as seen by HiRISE under HiWish program. Location is east of Gale Crater in the Aeolis quadrangle.

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  Mound showing layers at the base, as seen by HiRISE under HiWish program. Location is east of Gale Crater in the Aeolis quadrangle.

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  Yardangs showing layers, as seen by HiRISE under HiWish program. Location is east of Gale Crater in the Aeolis quadrangle.

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  Mesas and eroded parts of mesas showing layers and dark slope streaks, as seen by HiRISE under HiWish program. Image is located in eastern Avernus Colles.

See also

• Fossa (geology)
• Geography of Mars
• Geology of Mars
• List of plains on Mars
• List of quadrangles on Mars

References

1. USGS Gazetteer of Planetary Nomenclature entry for Elysium Planitia
2. Young, Kelly (2005-02-25). "'Pack ice' suggests frozen sea on Mars". New Scientist. Retrieved 2007-01-30.
3. John B. Murray, JB; Muller, JP; Neukum, G; Werner, SC; Van Gasselt, S; Hauber, E; Markiewicz, WJ; Head Jw, 3rd; et al. (17 March 2007). "Evidence ... for a frozen sea close to Mars' equator". Nature 434 (7031): 352–355. Bibcode:2005Natur.434..352M. doi:10.1038/nature03379. PMID 15772653.
4. Foust, Jeff (9 March 2016). "NASA commits to 2018 Mars InSight launch". Latest News. SpaceNews.

External links

• Google Mars - zoomable map centered on Elysium Planitia, with three main volcanoes of Elysium visible
• google mars - Cerebrus Fossae fissures
• Elephant face on Mars