Inverted Fluvial Channels and Craters with Ejecta Rays
NASA/JPL-Caltech/UArizona
Inverted Fluvial Channels and Craters with Ejecta Rays
PSP_007394_1750  Science Theme: Sedimentary/Layering Processes
The lower part of this image shows well-defined overlapping channels, which have inverted topography (i.e., they were once low spots that have been filled in with sediments and now eroded in a such a way that they appear as topographically high regions).

The channels have a winding and intersecting geometry indicating the shifting of the channels over time, a feature consistent with the flow of water in rivers. The channels have small craters that have excavated the channel materials and ejected them to form well-defined rays. There are dark slope streaks (toward the top of the image) showing transport of fine dust down the slope of an eroded bedrock terrain.

Written by: John Grotzinger  (19 March 2008)

This is a stereo pair with ESP_019736_1750.
 
Acquisition date
23 February 2008

Local Mars time
14:53

Latitude (centered)
-5.234°

Longitude (East)
180.099°

Spacecraft altitude
266.6 km (165.7 miles)

Original image scale range
27.0 cm/pixel (with 1 x 1 binning) so objects ~81 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
8.7°

Phase angle
40.2°

Solar incidence angle
47°, with the Sun about 43° above the horizon

Solar longitude
36.0°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  30.9°
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   (1432MB)

IRB color
map-projected   (631MB)

JP2 EXTRAS
Black and white
map-projected  (786MB)
non-map           (750MB)

IRB color
map projected  (223MB)
non-map           (596MB)

Merged IRB
map projected  (316MB)

Merged RGB
map-projected  (323MB)

RGB color
non map           (569MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

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.