Eroding Sediments
Eroding Sediments
ESP_067690_1860  Science Theme: Sedimentary/Layering Processes
This image shows evidence of a complex cycle of cratering and erosion. The center of the image covers an old impact crater, roughly 6 to 7 kilometers in diameter. This can actually be easier to see in lower-resolution images that cover more area, like those from MRO’s Context Camera. The crater was later filled by sediments.

Erosion then occurred across the region. The crater rim was left high-standing even though material outside the rim was eroded down to the level of the crater floor. The sediments filling the crater also eroded from the rim inwards, leaving a circular pancake of sedimentary rock. Similar “rim-inwards” erosion has been hypothesized for the (much larger) Gale Crater where the Curiosity rover is operating.

Written by: Colin Dundas  (16 February 2021)

This is a stereo pair with ESP_067822_1860.
Acquisition date
03 January 2021

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
271.9 km (169.0 miles)

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

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
41°, with the Sun about 49° above the horizon

Solar longitude
342.2°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  346.5°
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IRB color
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Merged IRB
map projected

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map-projected   (799MB)

IRB color
map-projected   (430MB)

Black and white
map-projected  (379MB)
non-map           (434MB)

IRB color
map projected  (155MB)
non-map           (361MB)

Merged IRB
map projected  (185MB)

Merged RGB
map-projected  (177MB)

RGB color
non map           (343MB)
Map-projected, reduced-resolution
Full resolution JP2 download
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Color label
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IRB: infrared-red-blue
RGB: red-green-blue
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Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

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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.