Impact Melt Flows and Ponds
NASA/JPL/UArizona
Impact Melt Flows and Ponds
PSP_006993_1875  Science Theme: Impact Processes
This image shows various crater-related features. Specifically, we see a raised mound in the middle, called a central uplift, and terraces (or ledges) on the crater wall. Within these locations are dark-toned deposits consistent with impact melt-bearing substances that behave as flows and ponded materials.

This Context Camera mosaic image shows a large 60-kilometer diameter crater named Mojave to the east of this HiRISE image. The impact melt-bearing material within the smaller crater likely originated from Mojave Crater. Therefore, we know that Mojave formed after this smaller crater.

As a result of the Mojave Crater impact, ejected material was transported to the smaller crater, some of which flowed around and some spilled inside and filled the topographic lows, such as on the terraces or the crater floor. Within the melt, we see evidence of “pitting.” Pitting comes from the release of volatile gases. These pits are commonly associated with and diagnostic of impact melt-bearing material on Mars and other rocky and ice-rich bodies in the Solar System.

Written by: Will Yingling, Eric Pilles and Livio L. Tornabene  (3 February 2020)

This is a stereo pair with PSP_006703_1875.
 
Acquisition date
23 January 2008

Local Mars time
14:30

Latitude (centered)
7.289°

Longitude (East)
325.630°

Spacecraft altitude
278.3 km (172.9 miles)

Original image scale range
29.7 cm/pixel (with 1 x 1 binning) so objects ~89 cm across are resolved

Map projected scale
25 cm/pixel and North is up

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Equirectangular

Emission angle
21.1°

Phase angle
57.9°

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

Solar longitude
21.6°, Northern Spring

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North azimuth:  96°
Sub-solar azimuth:  11.5°
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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.