Hagal dune field
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Hagal is the informal name of a dune field on Mars located below the north pole of Mars. Its name derives from the sand dunes in Frank Herbert's novel Dune and the fictional planet Hagal. It is locate
The Hagal dune field. Image was taken on 6 February 2016 at 15:16 local Mars time.
Detail of the dots and dashes of the dunes on 6 February 2016, at 15:16 local Mars time.
Detail of the dots and dashes of the dunes with distance scale
Olympia Undae
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Olympia Undae is a vast dune field in the north polar region of the planet Mars. It consists of a broad "sand sea" or erg that partly rings the north polar plateau from about 120° to 240°E longitude a
Hagal dune field
…Nili Patera dune field Olympia Undae Hyperboreae Undae…
Olympia Undae is the largest field of sand dunes on the planet Mars.
Olympia Undae dunes, as seen by HiRISE. Two sets of transverse dunes are visible, indicating varying wind direction. Olympia Undae is also known as the North Polar Erg.
Closeup, color-enhanced image of Olympia Undae dunes with melting/subliming ice-cap fragments. Note Barchan dunes and patterned ground. Width of image is about 1 km/3000 ft.
CRISM spectral signal for gypsum (polyhydrated sulfates) in Olympia Undae dunes.