Tag Archives: Nirgal Vallis

THEMIS: Winding channel of Nirgal Vallis

Posted on November 26, 2018 by rburnham

THEMIS Image of the Day, November 26, 2018. Today’s VIS image shows a small section of Nirgal Vallis. Located in Noachis Terra, Nirgal Vallis was carved by water and forms one of the longest valley systems on Mars. See more … Continue reading →

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Nirgal Vallis flow built an alluvial fan in Uzboi Vallis relatively recently

Posted on June 27, 2018 by rburnham

[Editor’s note: From a paper by Sharon Wilson and three co-authors recently published in the Journal of Geophysical Research.] • We identify and characterize a deposit (upper and lower units) on the floor of Uzboi Vallis near the confluence of … Continue reading →

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HiRISE: Ridges near Nirgal Valles

Posted on March 7, 2018 by rburnham

In this observation, we see a set of straight ridges in ancient bedrock near Nirgal Valles. The patterns indicate fractures from tectonic stresses, but how have they been hardened to now stand in positive relief after billions of years of … Continue reading →

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THEMIS: Channels across lava plains near Nirgal Vallis

Posted on June 22, 2017 by rburnham

THEMIS Image of the Day, June 22, 2017. Do you see what I do? Someone on Mars is smiling at me. (THEMIS Art #131) More THEMIS Images of the Day by geological topic.

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THEMIS: Channels of Nirgal Vallis

Posted on March 2, 2017 by rburnham

THEMIS Image of the Day, March 2, 2017. This VIS image shows a portion of Nirgal Vallis. A tributary of the channel is seen on the left side of the image, with the main channel crossing the image from left … Continue reading →

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HiRISE: Terrain northeast of Nirgal Vallis

Posted on September 21, 2016 by rburnham

Terrain northeast of Nirgal Vallis. Beautiful Mars series.

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HiRISE: Gullies and bedrock in Nirgal Vallis

Posted on February 12, 2015 by rburnham

The gullies in this image are within the valley wall of an ancient channel — Nirgal Vallis — a testament to flowing water in Mars’ ancient past. However, the formation of gullies are still the subject of much debate with … Continue reading →

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HiRISE: Possible phyllosilicates in Nirgal Vallis

Posted on February 5, 2015 by rburnham

Possible phyllosilicates in Nirgal Vallis. Beautiful Mars series.

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