Tag Archives: dune gullies

Opportunity begins study of valley’s origin

NASA’s Mars Exploration Rover Opportunity has reached the main destination of its current two-year extended mission — an ancient fluid-carved valley incised on the inner slope of a vast crater’s rim. As the rover approached the upper end of “Perseverance … Continue reading

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HiRISE: Glowing gullies in Kaiser Crater dunes

The giant sand dunes in Kaiser Crater experience gully erosion of the steep slip faces every year in late winter as the sun warms these slopes and seasonal carbon dioxide frost sublimates (meaning it changes from a solid to gas). … Continue reading

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HiRISE: Dune gullies in the Argyre region

Like silk — Dune gullies in the Argyre region. Beautiful Mars series.

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HiRISE: Active high-latitude dune gullies

Gully and defrosting activity have been visible here along the edge of a dune field, along with blocks of frost. Observations of the same area help us check for repeat activity, as well as measuring those meter-scale blocks that we’ve … Continue reading

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HiRISE: Russell Crater dune and gully changes

Changes among the Russell Crater dunes and gullies. Beautiful Mars series.

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HiRISE: Monitoring changes in Russell Crater

Monitor changes among the Russell Crater dunes and gullies. [Image at right cropped] More HiRISE images.

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HiRISE: Melt

Beautiful Mars series: Melt. More Beautiful Mars images.

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