North polar region of Mars: Imaging results from Viking 2

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During October 1976, the Viking 2 orbiter acquired approximately 700 high-resolution images of the north polar region of Mars. These images confirm the existence at the north pole of extensive layered deposits largely covered over with deposits of perennial ice. An unconformity within the layered deposits suggests a complex history of climate change during their time of deposition. A pole-girdling accumulation of dunes composed of very dark materials is revealed for the first time by the Viking cameras. The entire region is devoid of fresh impact craters. Rapid rates of erosion or deposition are implied. A scenario for polar geological evolution, involving two types of climate change, is proposed.

Publication type Article
Publication Subtype Journal Article
Title North polar region of Mars: Imaging results from Viking 2
Series title Science
DOI 10.1126/science.194.4271.1329
Volume 194
Issue 4271
Year Published 1974
Language English
Publisher AAAS
Contributing office(s) Astrogeology Science Center
Description 9 p.
First page 1329
Last page 1337
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