Deposits along the Northern Wall of Melas Chasma
NASA/JPL/UArizona
Deposits along the Northern Wall of Melas Chasma
ESP_045960_1705  Science Theme: Sedimentary/Layering Processes
It has been known since the 1970s when the Viking orbiters took pictures of Mars that there are large (i.e., several kilometers-thick) mounds of light-toned deposits within the central portion of Valles Marineris. More recent higher resolution images of Mars, including this image of Melas Chasma, show that the wall rocks of Valles Mariners also contain similar, albeit thinner, light-toned deposits.

Spectral data from the CRISM instrument indicate that the larger mounds are composed of sulfates. Some of the wall rock deposits are also made up of sulfates, but others contain clays or mixtures of several kinds of hydrated materials, suggesting that multiple aqueous processes, perhaps at different times within Valles Marineris, formed the variety of deposits we now observe.

Written by: Cathy Weitz (narration: Tre Gibbs)  (5 October 2016)

This is a stereo pair with ESP_051775_1705.
 
Acquisition date
16 May 2016

Local Mars time
15:19

Latitude (centered)
-9.630°

Longitude (East)
289.377°

Spacecraft altitude
265.2 km (164.8 miles)

Original image scale range
26.6 cm/pixel (with 1 x 1 binning) so objects ~80 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
1.6°

Phase angle
55.3°

Solar incidence angle
54°, with the Sun about 36° above the horizon

Solar longitude
153.5°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  27.6°
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   (935MB)

IRB color
map-projected   (543MB)

JP2 EXTRAS
Black and white
map-projected  (490MB)
non-map           (513MB)

IRB color
map projected  (183MB)
non-map           (445MB)

Merged IRB
map projected  (224MB)

Merged RGB
map-projected  (213MB)

RGB color
non map           (423MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

BONUS
4K (TIFF)

BONUS (MP4)
HiClip mini HD

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.