A Complex Crater in Arabia Terra
A Complex Crater in Arabia Terra
PSP_010354_2165  Science Theme: Fluvial Processes
This highly modified crater is located in Arabia Terra at the boundary between the southern highlands and northern lowlands. The crater is intersected by one of the putative shorelines of the hypothesized ancient northern ocean.

It is in a region which has also been proposed to have younger Amazonian fluvial deposits. The south rim of the crater is additionally cut by well-defined gullies.

The crater is filled with sediments, possibly fluvial or lake-like in origin. They were probably emplaced in two or more separate episodes, as two different floor units are clearly visible, separated by a fractured zone. The erosion pattern of the mesa walls shows that the inner structure of the upper floor material is densely layered. The mass wasting (landslide) deposits from the mesas superimpose the windblown ripples, suggesting that the mesa degradation and fracturing is recent, and possibly even ongoing.

Written by: Hanna Lahtela  (17 December 2008)
Acquisition date
11 October 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
294.8 km (183.2 miles)

Original image scale range
from 30.2 cm/pixel (with 1 x 1 binning) to 60.5 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
50°, with the Sun about 40° above the horizon

Solar longitude
140.1°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  355.7°
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   (1362MB)

IRB color
map-projected   (739MB)

Black and white
map-projected  (568MB)
non-map           (383MB)

IRB color
map projected  (244MB)
non-map           (574MB)

Merged IRB
map projected  (385MB)

Merged RGB
map-projected  (371MB)

RGB color
non map           (570MB)
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

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NASA/JPL/University of Arizona

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.