Tag Archives: gullies

HiRISE: Gullies & layers near Mariner Crater

Posted on March 13, 2015 by rburnham

Gullies are commonly found in the southern mid-latitudes of Mars. In this image they start near top of a long ridge, and descend into an impact crater that lies at the bottom of the ridge, moving through a rocky layer … Continue reading →

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HiRISE: Asimov Crater gullies

Posted on February 24, 2015 by rburnham

Asimov Crater gullies. Beautiful Mars series.

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THEMIS: Gullies

Posted on February 19, 2015 by rburnham

THEMIS Image of the Day, February 19, 2015. Numerous gullies dissect the rim of this unnamed crater in Terra Cimmeria. More THEMIS Images of the Day by geological topic.

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HiRISE: Boulders in gully alcoves

Posted on February 13, 2015 by rburnham

Gullies are often found on steep slopes. In the winter, this area is covered with a layer of carbon dioxide ice (dry ice). In the spring, when the ice warms up and transitions to gas, it dislodges material on the … Continue reading →

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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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THEMIS: Lowell Crater

Posted on February 11, 2015 by rburnham

THEMIS Image of the Day, February 11, 2015. This VIS image shows small dunes and gullies along the interior rim of Lowell Crater. More THEMIS Images of the Day by geological topic.

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THEMIS: Asimov Crater

Posted on February 10, 2015 by rburnham

THEMIS Image of the Day, February 10, 2015. Numerous gullies are visible in this VIS image of Asimov Crater. More THEMIS Images of the Day by geological topic.

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Gully patterns document Mars climate cycles

Posted on January 29, 2015 by rburnham

Geologists from Brown University have found new evidence that glacier-like ice deposits advanced and retreated multiple times in the midlatitude regions of Mars in the relatively recent past. For the study, in press in the journal Icarus, the researchers looked … Continue reading →

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HiRISE: Gullies old and new near Argyre

Posted on January 28, 2015 by rburnham

As gullies form on slopes, sediment can become deposited to form lobe-shaped fans. Gullies can form with flowing water, but don’t have to: sometimes they can be formed by the dry flow of sand and dust grains. This HiRISE image … Continue reading →

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HiRISE: Gullies in Liu Hsin Crater

Posted on January 23, 2015 by rburnham

Here we have a group of small gullies along a rock layer on the south wall of Liu Hsin Crater. At the foot of the gullies you can see the “fans” of granular sediment that have been deposited downhill from … Continue reading →

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