Varied Types of Rock in a Crater in Eos Chasma
Varied Types of Rock in a Crater in Eos Chasma
ESP_072413_1700  Science Theme: Mass Wasting Processes
This image shows a crater on the floor of Eos Chasma, part of the Valles Marineris canyon system. Craters on Mars are useful for geologists because they provide cross-sections into the subsurface. The south wall of this crater shows evidence of several different types of rock, with diverse colors.

In the black and white parts of the image, it appears that there are two types of rock: one relatively light and one dark. However, in the 1.1 kilometer-wide color swath we can see that the dark rocks are more complicated, as some have a greenish tint and others are purple.

Note that these are not the colors your eyes would see if you were there! In enhanced color, the HiRISE near-infrared data appears as red, the red is shown as green, and the blue-green data is shown as blue, allowing us to see more information at once.

Written by: Colin Dundas (narration: Tre Gibbs)  (15 February 2022)
Acquisition date
06 January 2022

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
269.1 km (167.2 miles)

Original image scale range
from 26.9 cm/pixel (with 1 x 1 binning) to 53.9 cm/pixel (with 2 x 2 binning)

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
60°, with the Sun about 30° above the horizon

Solar longitude
153.6°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  24.9°
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

Black and white
map-projected   (476MB)

IRB color
map-projected   (405MB)

Black and white
map-projected  (230MB)
non-map           (346MB)

IRB color
map projected  (105MB)
non-map           (320MB)

Merged IRB
map projected  (146MB)

Merged RGB
map-projected  (136MB)

RGB color
non map           (317MB)
10K (TIFF)

B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

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

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’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.