Tag Archives: gullies

HiRISE: Slide on down

Posted on June 2, 2017 by rburnham

Slide on down. Beautiful Mars series.

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HiRISE: Gullies in Ariadnes Colles

Posted on June 1, 2017 by rburnham

Gullies in Ariadnes Colles. Beautiful Mars series.

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Subsurface as the key to surface on Martian gullies

Posted on May 31, 2017 by rburnham

Planetary Geomorphology Image of the Month, May 31, 2017: T. de Has (Durham University). Martian gullies are composite landforms that comprise an alcove, channel and depositional fan. They are very young geological features, some of which have been active over … Continue reading →

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HiRISE: Colorful equatorial gullies in Krupac Crater

Posted on May 2, 2017 by rburnham

Although large gullies (ravines) are concentrated at higher latitudes, there are gullies on steep slopes in equatorial regions. An enhanced-color closeup shows part of the rim and inner slope of Krupac Crater located just 7.8 degrees south of the equator. … Continue reading →

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THEMIS: Asimov Crater’s sedimentary infill

Posted on May 1, 2017 by rburnham

THEMIS Image of the Day, May 1, 2017. Today’s false color image shows more of Asimov Crater. Gullies along the crater rim are visible in this image. Where did the crater’s infill come from?  What is removing it? The THEMIS … Continue reading →

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HiRISE: Gullies with color anomalies

Posted on April 28, 2017 by rburnham

This is an oblique view of gully deposits from the steep slope of an impact crater. The deposits with anomalous (bluish) colors may reveal very recent activity, not yet homogenized by dust deposition, or there may be sand preferentially trapped … Continue reading →

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HiRISE: How old are martian gullies?

Posted on April 25, 2017 by rburnham

Gullies eroded into the steep inner slope of an impact crater at this location appear perfectly pristine. Although at first glance it may appear that there are craters superimposed on the gully fans, inspection of HiRISE stereo coverage shows that … Continue reading →

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HiRISE: A winter’s view of a gullied crater

Posted on April 18, 2017 by rburnham

This is the location with the most impressive known gully activity in the Northern hemisphere. Gullies are active in the winter due to carbon dioxide frost, but northern winters are shorter and warmer than southern winters, so there is less … Continue reading →

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HiRISE: Gully monitoring

Posted on April 10, 2017 by rburnham

Gully monitoring. Beautiful Mars series.

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THEMIS: Two impacts in one at Gasa Crater

Posted on April 10, 2017 by rburnham

THEMIS Image of the Day, April 7, 2017. The small crater on the floor of the larger crater is called Gasa Crater. Gullies dissect the rims of both craters. These craters are located in Eridania Planitia. As most impacts from … Continue reading →

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