Astronomy:Harmakhis Vallis

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Harmakhis Vallis
Dao Niger and Harmakhis Vallis PIA02810.jpg
Harmakhis Vallis is the rightmost channel pictured. The direction of water flow was toward the bottom of the image.
CoordinatesCoordinates: 40°24′S 90°24′E / 40.4°S 90.4°E / -40.4; 90.4
NamingAncient Egyptian word for "Mars"

Harmakhis Vallis is a valley near Hellas Planitia, Mars. It has been identified as an outflow channel, the site of catastrophic floods of water during Mars' past.

Gullies are also common on the wall of Harmakhis Vallis, as seen the image below. Some authors have suggested these structures indicate geologically recent flow of small quantities of water across the surface.[1]

See also


  1. Heldmann, J. and M. Mellon. Observations of Martian gullies and constraints on potential formation mechanisms. 2004. Icarus. 168: 285-304.
Further reading

External links