Clays in the Eridania Basin
NASA/JPL/University of Arizona
Clays in the Eridania Basin
ESP_055392_1510  Science Theme: Sedimentary/Layering Processes
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This colorful image shows clays within the Eridania basin region. Many scientists using orbital data have proposed that a large lake may have once existed here during the Late Noachian through Early Hesperian time periods, and then much of the water drained out to the north via Ma’adim Vallis.

Understanding where and what kind of clay exists within this region using CRISM data can help scientists learn more about how long the postulated lake existed and the water chemistry within the lake.

Written by: Cathy Weitz (audio: Tre Gibbs)  (9 July 2018)

This is a stereo pair with PSP_010888_1510.
 
Acquisition date
21 May 2018

Local Mars time:
15:43

Latitude (centered)
-28.649°

Longitude (East)
181.784°

Spacecraft altitude
276.5 km (172.8 miles)

Original image scale range
55.3 cm/pixel (with 2 x 2 binning) so objects ~166 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
23.5°

Phase angle:
40.5°

Solar incidence angle
61°, with the Sun about 29° above the horizon

Solar longitude
179.5°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  27.1°
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non-map           (177MB)

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non-map           (205MB)

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RGB color
non map           (182MB)
ANAGLYPHS
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Full resolution JP2 download
Anaglyph details page

ADDITIONAL INFORMATION
B&W label
Color label
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Merged RGB label
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HiView

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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

USAGE POLICY
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

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.