Layered Deposits in Terby Crater
NASA/JPL/University of Arizona
Layered Deposits in Terby Crater
PSP_001662_1520  Science Theme: Future Exploration/Landing Sites
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Terby Crater is a large (approximately 165 kilometer), Noachian-aged crater located on the northern rim of the Hellas impact basin.

Terby hosts a very impressive sequence of predominantly light-toned layered deposits, up to 2.5 kilometers thick that are banked along its northern rim and extend toward the center of the crater.

The full image shows this stack of layered rocks as they are exposed westward facing scarp. The layered sequence consists of many beds that are repetitive, relatively horizontal and laterally continuous on a kilometer scale. Many beds are strongly jointed and fractured and exhibit evidence of small-scale wind scour.

The light-toned layers are typically at least partially covered with dark mantling material that obscures the layers as well as debris and numerous, meter-scale boulders that have cascaded down slope. The processes responsible for formation of these layers remain a mystery, but could include deposition in water, by the wind, or even volcanic activity.

Written by: John Grant  (10 October 2007)

This is a stereo pair with PSP_002572_1520.
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Acquisition date
03 December 2006

Local Mars time:

Latitude (centered)

Longitude (East)

Range to target site
258.1 km (161.3 miles)

Original image scale range
25.8 cm/pixel (with 1 x 1 binning) so objects ~77 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle:

Phase angle:

Solar incidence angle
68°, with the Sun about 22° above the horizon

Solar longitude
144.9°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  36.6°
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IRB color
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Merged IRB
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Merged RGB
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map-projected   (487MB)

IRB color
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Black and white
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non-map           (296MB)

IRB color
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non-map           (234MB)

Merged IRB
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Merged RGB
map-projected  (113MB)

RGB color
non map           (217MB)
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

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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.