File:Eastern Noachis Terra - Viking 1 - Southern Hemisphere - 1980-04-09 - Rev 1378 (38420678605).png

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This image of Mars is a 4 frame color mosaic taken by Viking Orbiter 1. This mosaic covers some of the oldest terrain on the Martian surface, eastern Noachis Terra. This image is taken looking south across Noachis Terra. Subtle parallel valleys can be seen at top center. These represent faults that opened up following the Hellas Basin impact. This enormous impact ejected so much material that the crust over 2000 km away slumped inwards to fill the hole.

Water ice clouds can also be seen in this picture. A few, especially in the top left corner, form a distinctive wavelike pattern. These are called gravity waves, which form after air is forced to rise over the rims of craters. These wakes form on the lee side of craters, giving us a clue as to the direction of air flow in this region.

Image Credit: NASA / JPL / USGS / Justin Cowart
Date
Source Eastern Noachis Terra - Viking 1 - Southern Hemisphere - 1980-04-09 - Rev 1378
Author Justin Cowart

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by jccwrt at https://flickr.com/photos/132160802@N06/38420678605. It was reviewed on 3 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

3 December 2020

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current12:22, 3 December 2020Thumbnail for version as of 12:22, 3 December 20202,054 × 1,970 (6.17 MB)Eyes Roger (talk | contribs)Transferred from Flickr via #flickr2commons

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