In the Gullies and Bedrock of Ius Chasma
NASA/JPL/University of Arizona
In the Gullies and Bedrock of Ius Chasma
ESP_058580_1720  Science Theme: Geologic Contacts/Stratigraphy
twitter  •  tumblr

HICLIP
1080p (MP4)
Audio (MP3)

WALLPAPER
800
1024
1152
1280
1440
1600
1920
2048
2560
2736
2880
4500
4K
8K
10K

HIFLYER
PDF (11 x 17)

HISLIDES
PowerPoint
Keynote
PDF

This image was acquired in Ius Chasma, a major section of the western portion of the giant Valles Marineris trough.

We see a portion of a steep slope with gullies extending downhill (towards bottom of image). Many of the gully floors are dark, and in some places that dark material extends onto the fan-shaped deposits of the gullies. These dark features are candidates for recurring slope lineae (RSL), which are seasonal features that grow incrementally. The relation between RSL and gullies is not clear: does the RSL activity carve the gullies, or do they simply follow the gully topography created by other processes?

Another closeup from this observation shows part of the floor of Ius Chasma, with layered bedrock draped by dunes.

Written by: Alfred McEwen (audio: Tre Gibbs)  (18 March 2019)
 
Acquisition date
25 January 2019

Local Mars time
14:03

Latitude (centered)
-7.955°

Longitude (East)
278.191°

Spacecraft altitude
264.2 km (164.2 miles)

Original image scale range
53.2 cm/pixel (with 2 x 2 binning) so objects ~160 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
5.5°

Phase angle
25.3°

Solar incidence angle
31°, with the Sun about 59° above the horizon

Solar longitude
329.9°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  355.4°
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   (296MB)

IRB color
map-projected   (157MB)

JP2 EXTRAS
Black and white
map-projected  (166MB)
non-map           (169MB)

IRB color
map projected  (77MB)
non-map           (177MB)

Merged IRB
map projected  (319MB)

Merged RGB
map-projected  (301MB)

RGB color
non map           (166MB)
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.