Juventae Chasma

Juventae Chasma is an enormous box canyon (250 km × 100 km) on Mars which opens to the north and forms the outflow channel Maja Valles.^[1]

Juventae Chasma is located north of Valles Marineris in the Coprates quadrangle and cuts more than 5 km into the plains of Lunae Planum. The floor of Juventae Chasma is partly covered by sand dunes. There is also a 2.5 km high mountain inside Juventae, 59 km long and 23 km wide, that was confirmed by Mars Express to be composed of sulfate deposits.^[2] MRO discovered sulfates, hydrated sulfates, and iron oxides in Juventae Chasma.^[3] Juventae Chasma has four bright mounds or light-toned interior layered deposits (IlD's), as they are often called. Researchers have found that monohydrated sulfates were first deposited on the floor. And then polyhydrated sulfates were laid down. Kieserite, a magnesium sulfate, was also found in Juventae Chasma.^[4]

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  Light toned sedimentary outcrops on the floor of Juventae Chasma.
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  Juventae Chasma Troughs, as seen by HiRISE.
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  Inverted Streams near Juventae Chasma, as seen by Mars Global Surveyor. These streams begin at the top of a ridge then run together.
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  Inverted Channels near Juventae Chasma, as seen by HiRISE. Channels were once regular stream channels. Scale bar is 500 meters long.
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  Layers west of Juventae Chasma, as seen by HiRISE. Scale bar is 500 meters long.
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  Plateau near Juventae Chasma.

References

See also

• Lakes on Mars