Bright and Dark Terrain in Noctis Labyrinthus
NASA/JPL-Caltech/UArizona
Bright and Dark Terrain in Noctis Labyrinthus
ESP_024427_1740  Science Theme: Sedimentary/Layering Processes
This image shows the transitional terrain where the linear troughs and rounded pits of Noctis Labyrinthus merge with the larger chasmata of Valles Marineris. Unusual bright blocks can be seen beneath a layered dark mantle.

The bright blocks also have some layering and show hydration features in CRISM spectra. The bright blocks are jagged and irregular in shape, perhaps because they represent impact material or because they are partially obscured beneath a dark mantle so we cannot see their full extent.

The dark mantle consists of aeolian (wind-driven) material (as evidenced by linear ripples) as well as a finely layered unit. The dark layered mantle does not show any hydration features in CRISM spectra so perhaps it represents multiple events of wind deposition where each time this material was laid down it became a distinct layer.

Written by: Cathy Weitz  (30 November 2011)

This is a stereo pair with PSP_006692_1740.
 
Acquisition date
12 October 2011

Local Mars time
14:22

Latitude (centered)
-5.999°

Longitude (East)
267.238°

Spacecraft altitude
263.2 km (163.6 miles)

Original image scale range
27.3 cm/pixel (with 1 x 1 binning) so objects ~82 cm across are resolved

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25 cm/pixel and North is up

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Equirectangular

Emission angle
16.1°

Phase angle
52.4°

Solar incidence angle
37°, with the Sun about 53° above the horizon

Solar longitude
14.3°, Northern Spring

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North azimuth:  97°
Sub-solar azimuth:  24.3°
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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.