A Tale of Two Flows
A Tale of Two Flows
ESP_043609_2230  Science Theme: Glacial/Periglacial Processes
This image was taken in one of the regions on Mars well-known for its viscous flow features (VFF), which are massive flowing deposits believed to be composed of a mixture of ice and dust similar to glaciers on Earth.

In this particular region, an impact event occurred creating ejecta deposits that also appear to flow (probably because of their similarly ice-rich composition), and interact with the flows from the VFF. Looking closer, we can see that the VFF deposits (on the right) appear to be rougher in appearance than those of the impact ejecta.

We will need to study this image in more detail to understand how these flows have interacted with each other and what they can tell us about their composition and their flowing behavior properties.

Written by: M. Ramy El-Maarry (audio: Tre Gibbs)  (27 January 2016)
Acquisition date
15 November 2015

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
300.9 km (187.0 miles)

Original image scale range
30.2 cm/pixel (with 1 x 1 binning) so objects ~91 cm across are resolved

Map projected scale
25 cm/pixel and North is up

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Emission angle

Phase angle

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

Solar longitude
68.7°, Northern Spring

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  351.4°
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Black & white is 5 km across; enhanced color about 1 km
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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:
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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.