Tag Archives: basaltic sand

THEMIS: Terra Sabaea crater in false color

THEMIS Image of the Day, September 18, 2018. Part of a large crater fills the center of this VIS image. In this false color image the dark blue material is basaltic sand. The sands are located between the crater rim … Continue reading

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THEMIS: Basaltic sand amid hills in Terra Sabaea

THEMIS Image of the Day, September 14, 2018. Today’s VIS image shows part of northern Terra Sabaea, where hills are common. The blue tones are usually locations of basaltic sand. The THEMIS VIS camera contains 5 filters. The data from … Continue reading

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THEMIS: Mesas, plains, craters in Terra Sabaea

THEMIS Image of the Day, September 11, 2018. This VIS image shows part of Terra Sabaea, including plains, craters, and mesas. The dark blue tones often indicate locations of basaltic sands. The THEMIS VIS camera contains 5 filters. The data … Continue reading

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HiRISE: Uplifted blocks of light-toned layered deposits

Aram Chaos lies within a 280 kilometer-diameter ancient impact crater in the Southern Highlands of Mars. Uplifted blocks of light-toned layers, composed largely of the iron-oxide hematite and water-altered silicates, indicate that this crater once held a lake. Scientists suggest … Continue reading

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HiRISE: Dust and frost

Sand dunes in the north polar regions of Mars show light coatings of pale orange dust blown partially across the dark basaltic sand. Around the edges of the dunes, patches of seasonal dry ice remain. These patches will be gone … Continue reading

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THEMIS: Basaltic sand dunes in Arabia Terra crater

THEMIS Image of the Day, May 3, 2018. A group of dunes is visible on the floor of this unnamed crater in Arabia Terra. The dunes contain basaltic sand, which is darker than the dust covered materials of the rest … Continue reading

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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: 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: Basaltic dunes and frost in north polar lowlands

THEMIS Image of the Day, September 19, 2017. Siton Undae is a large dune field located in the northern plains near Escorial Crater. Siton Undae is west of the crater and is one of three dune fields near the crater. … Continue reading

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THEMIS: Basaltic sands in Russell Crater dune ridge

THEMIS Image of the Day, August 11, 2017. This image shows the western part of the dune field on the floor of Russell Crater. This is a false color image of Russell crater and it’s surroundings. Sand dunes usually appear … Continue reading

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