Tag Archives: dunes

HiRISE: Crater watchin’ in northeast Syrtis Major

Crater watchin’ in northeast Syrtis Major region. The dunes within the crater are fascinating for their cell shapes, caused by the wind. Beautiful Mars series.

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HiRISE: The moving sands of Lobo Vallis

Bright ripples line the topography in this region, formed within a past climate. Dark dunes and sand streaks (composed of basaltic sand) have moved and filled lower areas, pushed by more recent winds from the top towards the bottom of … Continue reading

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HiRISE: Wonderfully eye-like

Wonderfully eye-like. Beautiful Mars series.

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HiRISE: Mid-latitude crater with a spot in the middle

A mid-latitude crater with a spot in the middle. From orbit, the spot looks black, but we can see in the enhanced color closeup that it’s darker (basaltic?) material on top of the lighter dunes. Beautiful Mars series.

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THEMIS: Arabia Terra dune field in false color

THEMIS Image of the Day, March 23, 2018. This is a false color image of the dune field in the Arabia Terra crater. In this combination of bands, sand appears as a blue to dark blue color. In this image, … Continue reading

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THEMIS: Crater feeding sand into big dune field

THEMIS Image of the Day, March 22, 2018. The small crater in the image of the image is at the upwind side of the dune field. There is a considerable amount of sand within the crater, with a relatively smooth … Continue reading

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HiRISE: Dune erosion and streaks

Dune erosion and streaks. One of the many seasonal images we take to detect changes. In this case, we want to quantify the process of erosion driven by sublimation on the dunes. (Sublimation is the process of going directly from … Continue reading

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THEMIS: Finger-like dunes creep across Arabia Terra crater floor

THEMIS Image of the Day, March 21, 2018. This image is located southeast of the region of the large sand dune deposit. Here there is still limited amounts of available sand and the dunes formed are smaller individual features. The … Continue reading

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THEMIS: Dunes engulfing hills and mesas

THEMIS Image of the Day, March 20, 2018. The bottom of this image shows the hills and mesas within the crater. The dunes at the top of the image are engulfing and covering the hills. In some locations the hills … Continue reading

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THEMIS: Dunes and dust in Arabia Terra

THEMIS Image of the Day, March 19, 2018. Located in eastern Arabia is an unnamed crater, 120 kilometers (75 miles) across. The floor of this crater contains a large exposure of rocky material, a field of dark sand dunes, and … Continue reading

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