Jumbled Terrain East of Arsia Mons
Jumbled Terrain East of Arsia Mons
PSP_004056_1735  Science Theme: Mass Wasting Processes
This HiRISE image shows terrain west of the Martian volcano Arsia Mons, the southernmost of the three aligned giant volcanoes known as the Tharsis Montes. The summit of Arsia Mons rises almost 18 kilometers (11 miles) above Mars datum, about twice as high as Mt. Everest on the Earth.

This unusual terrain consists of irregular, raised knobs, many of which are linear. The origin of this texture is unclear; it has been proposed that these deposits are extensive landslide deposits or volatile-rich glacier-like deposits that have moved downslope from the volcano's upper flanks. In either case, the knobby texture gives the impression of a jumbled surface.

Covering the entire scene is a mantle of sedimentary material, most likely wind-blown dust. Subtle bright and dark wind streaks are visible, indicating that the dominant wind direction is right-to-left (west to east; north is up in the image). At full resolution, small slope streaks are evident around the edges of many of the high-relief knobs. These streaks may be avalanche scars where bright dust has been removed, exposing a darker subsurface layer. Fine ripples, which are linear ridges of sediment shaped by the wind, are also evident on most knobs when viewed at full resolution.

Written by: Bradley Thomson  (1 August 2007)
Acquisition date
08 June 2007

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
258.2 km (160.5 miles)

Original image scale range
26.2 cm/pixel (with 1 x 1 binning) so objects ~79 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
48°, with the Sun about 42° above the horizon

Solar longitude
253.6°, Northern Autumn

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  338.3°
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

Black and white
map-projected   (908MB)

IRB color
map-projected   (410MB)

Black and white
map-projected  (468MB)
non-map           (498MB)

IRB color
map projected  (177MB)
non-map           (400MB)

Merged IRB
map projected  (198MB)

Merged RGB
map-projected  (187MB)

RGB color
non map           (380MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:

NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.