Debris from a Former Martian Glacier
NASA/JPL-Caltech/UArizona
Debris from a Former Martian Glacier
ESP_079302_2100  Science Theme: 
Many mesas, hills, or mounds in the mid-latitudes of Mars show features extending from their walls that are called lobate debris aprons (LDAs). These LDA have been interpreted as debris-covered glaciers and have been shown by radar data to have nearly pure ice content beneath the meters-thick debris layer.

In some regions that may be closer to the equator, and thus warmer, such as this mound here in the Phlegra Dorsa region, most of the ice content has sublimed away, leaving behind a thin layer of debris that still maintains the lobate form and extent of the former (or relict) LDA.

Written by: Dan Berman  (31 October 2023)

 
Acquisition date
27 June 2023

Local Mars time
15:20

Latitude (centered)
29.586°

Longitude (East)
170.583°

Spacecraft altitude
292.4 km (181.7 miles)

Original image scale range
58.5 cm/pixel (with 2 x 2 binning) so objects ~176 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
0.0°

Phase angle
44.4°

Solar incidence angle
44°, with the Sun about 46° above the horizon

Solar longitude
83.2°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  12.7°
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   (234MB)

IRB color
map-projected   (130MB)

JP2 EXTRAS
Black and white
map-projected  (110MB)
non-map           (141MB)

IRB color
map projected  (45MB)
non-map           (111MB)

Merged IRB
map projected  (240MB)

Merged RGB
map-projected  (224MB)

RGB color
non map           (105MB)
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-Caltech/UArizona

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.