Mound of South Polar Layered Deposits
NASA/JPL/University of Arizona
Mound of South Polar Layered Deposits
PSP_002345_1095  Science Theme: Polar Geology
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The South Polar layered deposits are a stack of layered ice up to 3000 meters thick which is similar to terrestrial ice sheets. In places, this stack extends up to 1100 kilometers from the pole and many of the impact craters surrounding this ice-sheet appear to be filled with mounds of similar icy material and also sand dunes.

This image shows the material within one of these near-polar craters. The crater is about 44 kilometers across and contains a mound of material about 23 kilometers across and 300 meters thick on its northern (south facing) wall. The dark material at the top of the image shows the northern wall of the crater, the bright material that begins near the image top and extends toward the bottom is the surface of the mound.

This surface is covered with sand dunes that appear bright as they are still covered by seasonal carbon dioxide frost. Smaller dunes and ripples can be seen on the surfaces of the larger linear dunes. In the low lying areas between dunes, one can see a network of cracks that are reminiscent of the surface of the polar layered deposits, indicating that this mound is probably mostly ice with a thinner and incomplete covering of dunes.

The dark spots in the frost cover are characteristic of how this terrain defrosts, and are commonly observed in these locations during this season.

Written by: Shane Byrne  (21 February 2007)
 
Acquisition date
26 January 2007

Local Mars time:
16:10

Latitude (centered)
-70.293°

Longitude (East)
159.052°

Spacecraft altitude
248.5 km (155.3 miles)

Original image scale range
49.7 cm/pixel (with 2 x 2 binning) so objects ~149 cm across are resolved

Map projected scale
50 cm/pixel

Map projection
Polarstereographic

Emission angle:
0.3°

Phase angle:
83.9°

Solar incidence angle
84°, with the Sun about 6° above the horizon

Solar longitude
173.0°, Northern Summer

For non-map projected images
North azimuth:  99°
Sub-solar azimuth:  35.7°
JPEG
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

JP2
Black and white
map-projected   (184MB)

IRB color
map-projected   (94MB)

JP2 EXTRAS
Black and white
map-projected  (109MB)
non-map           (125MB)

IRB color
map projected  (57MB)
non-map           (95MB)

Merged IRB
map projected  (168MB)

Merged RGB
map-projected  (172MB)

RGB color
non map           (96MB)
ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
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

USAGE POLICY
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/JPL/University of Arizona

POSTSCRIPT
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.