Dusty Volcanic Vent in Syria Planum
Dusty Volcanic Vent in Syria Planum
PSP_001840_1660  Science Theme: Volcanic Processes
Previous images of this area by other space missions indicate that this is a shield volcano with very shallow slopes. What HiRISE reveals is that it is completely covered by a blanket of dust.

While volcanic features remain obscure, the dust does exhibit some very strange patterns. As you zoom into the middle of the image, the ground appears covered with a fine network of light and dark polygons. But at full resolution, it can be seen that these polygons are actually the edges of small scallops.

The dust is apparently held together by some unknown means, giving it sufficient strength to be carved into this strange pattern.

Written by: Laszlo P. Kestay  (7 March 2007)
Acquisition date
17 December 2006

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
252.3 km (156.8 miles)

Original image scale range
25.3 cm/pixel (with 1 x 1 binning) so objects ~76 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
60°, with the Sun about 30° above the horizon

Solar longitude
152.0°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  28.8°
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   (1006MB)

IRB color
map-projected   (530MB)

Black and white
map-projected  (439MB)
non-map           (649MB)

IRB color
map projected  (178MB)
non-map           (498MB)

Merged IRB
map projected  (292MB)

Merged RGB
map-projected  (303MB)

RGB color
non map           (476MB)
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.