Tag Archives: true polar wander

Valley network distribution supports true polar wander and an ancient ocean

Posted on August 20, 2018 by rburnham

[Editor’s note: From a paper by Ngai Ham Chan and three co-authors recently published in the Journal of Geophysical Research.] New Evidence of an Ancient Martian Ocean from the Global Distribution of Valley Networks • Surface deformation due to True … Continue reading →

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Perfect beaches ruined by martian volcanoes

Posted on April 10, 2018 by rburnham

The presence of potential shorelines in the northern hemisphere of Mars suggests that Mars once had oceans. The non-constant elevations of these putative shorelines, however, do not support that hypothesis. Recent work [published in Nature] by Robert Citron and colleagues … Continue reading →

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Great tilt gave Mars a new face

Posted on March 3, 2016 by rburnham

The surface of the planet Mars tilted by 20 to 25 degrees 3 to 3.5 billion years ago. This was caused by a massive volcanic structure, the Tharsis volcanic dome, which is the largest in the Solar System. Because of … Continue reading →

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