Layers in Eberswalde Crater
NASA/JPL/UArizona
Layers in Eberswalde Crater
PSP_004000_1560  Science Theme: Sedimentary/Layering Processes
This image covers a portion of Eberswalde Crater, revealing a possible delta-lake transition. Water flowed into the crater through a series of tributary channels to the west of the crater and after the water entered, it formed a distributive network and partly filled the crater to form a lake (Eberswalde Crater is approximately 70 kilometers wide and 1.2 kilometers deep).

The bright layers are part of the terminal scarp at the eastern edge of the delta. Some of the steeper slopes visible at the edge of the fan may be coarser-grained resistant channel ridges. The CRISM instrument on board the Mars Reconnaissance Orbiter has detected phyllosilicates (clays) in the bright layers. One of the ways clays form on Earth is when water erodes rock and makes fine particles which settle out of water; this often occurs in river deltas and lake beds. The delta in Eberswalde Crater and the detection of phyllosilicates provides evidence for possible persistent aqueous activity on Mars.



Written by: Joannah Metz  (10 October 2007)

This is a stereo pair with ESP_012610_1560.
 
Acquisition date
04 June 2007

Local Mars time
15:15

Latitude (centered)
-23.825°

Longitude (East)
326.483°

Spacecraft altitude
259.3 km (161.2 miles)

Original image scale range
26.0 cm/pixel (with 1 x 1 binning) so objects ~78 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
1.7°

Phase angle
42.8°

Solar incidence angle
45°, with the Sun about 45° above the horizon

Solar longitude
250.8°, Northern Autumn

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  355.9°
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HiView

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Black & white is 5 km across; enhanced color about 1 km
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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.