Glacial (Ice) or Lava Flow?
NASA/JPL-Caltech/UArizona
Glacial (Ice) or Lava Flow?
ESP_076502_2100  Science Theme: Glacial/Periglacial Processes
The geologic setting and latitude here suggest this is a glacial (ice-rich) flow, but the surface is broken into plates like many lava flows on Mars. An image was targeted here to get a better look.

At the meter-scale resolution of HiRISE, we see a hummocky surface with boulders and craters plus some wind-blown landforms that seems consistent with either the glacial or lava hypothesis. This is a common result: getting a higher-resolution image doesn’t necessarily provide more information about large-scale processes, instead providing information about how the surface has been modified.

Written by: Alfred McEwen (narration: Tre Gibbs)  (1 March 2023)

This is a stereo pair with ESP_077333_2100.
 
Acquisition date
21 November 2022

Local Mars time
14:14

Latitude (centered)
29.667°

Longitude (East)
285.920°

Spacecraft altitude
287.8 km (178.9 miles)

Original image scale range
57.8 cm/pixel (with 2 x 2 binning) so objects ~173 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
5.4°

Phase angle
53.9°

Solar incidence angle
49°, with the Sun about 41° above the horizon

Solar longitude
342.0°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  322.7°
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   (311MB)

IRB color
map-projected   (182MB)

JP2 EXTRAS
Black and white
map-projected  (167MB)
non-map           (212MB)

IRB color
map projected  (69MB)
non-map           (158MB)

Merged IRB
map projected  (302MB)

Merged RGB
map-projected  (277MB)

RGB color
non map           (147MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

BONUS
4K (TIFF)
8K (TIFF)
10K (TIFF)

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.