Knobs, Bright Deposits, and Inverted Channels in Eberswalde Crater
NASA/JPL-Caltech/UArizona
Knobs, Bright Deposits, and Inverted Channels in Eberswalde Crater
PSP_010052_1560  Science Theme: Future Exploration/Landing Sites
Eberswalde Crater is an approximately 65-kilometer diameter, closed basin crater. It contains a delta, which indicates that flowing water was present for an extended period of time in the past.

Parts of the crater have inverted channels that have higher relief because a more resistant material was deposited in the channel and therefore it was less susceptible to erosion than the surrounding area. The image also shows resistant knobs and mounds as well as a scoured surface.

The CRISM instrument on-board MRO has detected phyllosilicates (clays) in some of the bright layers here. On Earth, clays form in the presence of water, so this is more evidence that there was a persistent flow of water in Eberswalde.



Written by: Jennifer Griffes  (12 November 2008)

This is a stereo pair with PSP_010553_1560.
 
Acquisition date
17 September 2008

Local Mars time
15:43

Latitude (centered)
-23.873°

Longitude (East)
326.586°

Spacecraft altitude
258.7 km (160.8 miles)

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26.6 cm/pixel (with 1 x 1 binning) so objects ~80 cm across are resolved

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25 cm/pixel and North is up

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Emission angle
12.8°

Phase angle
60.2°

Solar incidence angle
69°, with the Sun about 21° above the horizon

Solar longitude
128.6°, Northern Summer

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North azimuth:  97°
Sub-solar azimuth:  40.0°
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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.