Tag Archives: fluvial channels

HiRISE: Three channels exiting a crater lake

Posted on April 4, 2018 by rburnham

This image shows a roundish crater with three channels breaching the rim and extending to the south. The crater has been filled by sediments and may have been an ancient lake. When the water began to overtop the crater rim, … Continue reading →

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THEMIS: Winding channel of Nanedi Valles

Posted on March 30, 2018 by rburnham

THEMIS Image of the Day, March 30, 2018. This VIS image shows a section of Nanedi Valles, located in Xanthe Terra. More THEMIS Images of the Day by geological topic.

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HiRISE: Crater tadpoles

Posted on February 9, 2018 by rburnham

This impact crater looks amusingly like a tadpole because of the valley that was carved by water that used to fill it. When the water level inside the crater increased, it breached the crater wall, flowed outward and formed a … Continue reading →

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Inverted terrain shows ancient stream-flow details

Posted on September 18, 2017 by rburnham

River deposits exist across the surface of Mars and record a surface environment from over 3.5 billion years ago that was able to support liquid water at the surface. A region of Mars named Aeolis Dorsa contains some of the … Continue reading →

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HiRISE: Cataracts in Kasei Valles

Posted on August 8, 2017 by rburnham

Obviously these are not the kind of cataracts that can develop in the lenses of your eyes, but large erosional scallops that form in river channels, like the Niagara Falls draining the Great Lakes of North America. Cataracts are large … 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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How hard did it rain on Mars?

Posted on May 17, 2017 by rburnham

Heavy rain on Mars reshaped the planet’s impact craters and carved out river-like channels in its surface billions of years ago, according to a new study published in Icarus. In the paper, researchers from the Smithsonian Institution and the Johns … Continue reading →

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HiRISE: Plains south of Valles Marineris

Posted on March 29, 2017 by rburnham

This enhanced-color sample reveals the incredible diversity of landforms on some Martian plains that appear bland and uniform at larger scales. Here we see layers, small channels suggesting water flow, craters, and indurated sand dunes. [More at link]

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HiRISE: Martian meanders and scroll-bars

Posted on March 1, 2017 by rburnham

This is a portion of an inverted fluvial channel in the region of Aeolis / Zephyria Plana, at the Martian equator. Channels become inverted when the sediments filling them become more resistant to erosion than the surrounding material. Here, the … Continue reading →

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THEMIS: Morning light on Reull Vallis

Posted on January 27, 2017 by rburnham

THEMIS Image of the Day, January 27, 2017. Today’s VIS image, made soon after local sunrise, shows a small portion of Reull Vallis. Reull Vallis is one of the major channels entering eastern Hellas Planitia. More THEMIS Images of the … Continue reading →

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