The Western Edge of a Layered Mound in Juventae Chasma
The Western Edge of a Layered Mound in Juventae Chasma
ESP_020470_1755  Science Theme: Sedimentary/Layering Processes
This observation covers the western edge of a layered mound in Juventae Chasma. The CRISM instrument on MRO has detected high sulfates at the base of this mound, and the resolution power of HiRISE gives us a better look at the area’s morphology.

Why are hydrated sulfates significant? Their existence here might indicate a past presence of water. Scientists may also ask how these minerals were deposited here. In this case, both CRISM and HiRISE can help determine a much clearer picture of the ancient Martian past.

This caption is based on the original science rationale.

Written by: HiRISE Science Team  (1 February 2011)

This is a stereo pair with ESP_014378_1755.
Acquisition date
08 December 2010

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
267.5 km (166.3 miles)

Original image scale range
27.9 cm/pixel (with 1 x 1 binning) so objects ~84 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
53°, with the Sun about 37° above the horizon

Solar longitude
194.9°, Northern Autumn

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  0.6°
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non-map           (430MB)

IRB color
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non-map           (338MB)

Merged IRB
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RGB color
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Map-projected, reduced-resolution
Full resolution JP2 download
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Black & white is 5 km across; enhanced color about 1 km
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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

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.