Tag Archives: MRO

HiRISE: Splitting slope streaks

Streaks form on slopes when dust cascades downhill. The dark streak is an area of less dust compared to the brighter and reddish surroundings. What triggers these avalanches is not known, but might be related to sudden warming of the … Continue reading

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MARCI weather report, Jan 29-Feb 4, 2018

Widespread water-ice cloud activity continued above many equatorial regions as well as areas north of Tempe Terra. Near the middle of the week, a couple of small short-lived dust storms were observed over northwestern Acidalia Planitia. Meanwhile in the southern … Continue reading

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HiRISE: Gullies and voids

Intricate gullies have formed on the northern wall of this impact crater located in the Terra Cimmeria region. This crater may have formed in a region rich in ground water. This ground water likely flowed down the wall, eventually eroding … Continue reading

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HiRISE: Geologic history revealed in Valles Marineris

An enhanced-color image reveals bedrock that is several kilometers below the top of the giant Valles Marineris canyons. The upper layers have relatively little diversity of colors and textures, but deeper levels show more complex processes. The upper layers could … Continue reading

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HiRISE: Holden Crater dunes

Holden Crater dunes. 260 km above the surface. Black and white is 5 km across, enhanced color is less than 1 km. Beautiful Mars series.

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HiRISE: Traipsing across Terra Sirenum

Traipsing across Terra Sirenum. Terra Sirenum is named after the Sirens who were birds with the heads of girls. In the Odyssey these girls captured passing seamen and killed them. Let’s hope future human exploration of this region is less … Continue reading

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MARCI weather report, January 22-28, 2018

The prevalence of water-ice clouds was strong across many regions of Mars last week. The aphelion cloud belt continued to rule the skies along the tropics. Poleward of Alba Patera, remainders of a recurring annular (ring-shaped) cloud were visible in … Continue reading

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HiRISE: Diverse composition and stratigraphy in the Claritas Region

Diverse composition and stratigraphy in the Claritas Region. This region, west of Solis Planum, is a tectonic and volcanic area located south-east of the Tharsis volcano group (the Tharsis Montes) on the Tharsis rise. It extends roughly north to south … Continue reading

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HiRISE: Ejecta and possible bedrock on a crater floor in Aonia Terra

Ejecta and possible bedrock on a crater floor in Aonia Terra. This is just to the east of an impact crater that is almost dead center within a much larger impact crater. (249 km above the surface; black and white … Continue reading

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HiRISE: Contact between fluvial units in Aeolis Dorsa

Contact between fluvial units in Aeolis Dorsa. Beautiful Mars series.

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