Terraced Fan in Aeolis Region
Terraced Fan in Aeolis Region
PSP_009729_1735  Science Theme: Fluvial Processes
This image shows the Southwest region of a degraded crater's floor, located near the equator.

The high-standing ridge near the bottom of the scene is a terrace that slumped off the crater's rim (located just south of this image). The bumpy terrain near the top of the image is also material that has slumped off the crater rim.

The center of the image contains a terraced fan. The fan emanates from a valley (not pictured, located left of the scene) that intersects the crater's south rim, which suggests that the valley might have transported fluid, likely water, into the crater. If this happened, then the fan marks where the flow deposited its sediment.

Written by: Kelly Kolb  (17 December 2008)

This is a stereo pair with ESP_015953_1735.
Acquisition date
23 August 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
264.6 km (164.5 miles)

Original image scale range
26.7 cm/pixel (with 1 x 1 binning) so objects ~80 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

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

Solar longitude
116.8°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  36.4°
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   (785MB)

IRB color
map-projected   (365MB)

Black and white
map-projected  (391MB)
non-map           (431MB)

IRB color
map projected  (145MB)
non-map           (357MB)

Merged IRB
map projected  (169MB)

Merged RGB
map-projected  (173MB)

RGB color
non map           (352MB)
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

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/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.