Tag Archives: gullies

HiRISE: Those rugged slopes

Those rugged slopes. Beautiful Mars series.

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HiRISE: Gullies and craters and dunes, oh my!

This unnamed, approximately 30-kilometer diameter crater, formed in the Southern highlands of Mars. Our image shows regions of geologic diversity within, making this an interesting spot for scientists to study how different Martian processes interact with each other. Gullies, or … Continue reading

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HiRISE: Slide on down

Slide on down. Beautiful Mars series.

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HiRISE: Gullies in Ariadnes Colles

Gullies in Ariadnes Colles. Beautiful Mars series.

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Subsurface as the key to surface on Martian gullies

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

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

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

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?

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

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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