Tag Archives: University of Arizona

HiRISE: Dune field in crater

Shadow dancing. Sometimes the less said about a picture, the better. Beautiful Mars series. [More at links]

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HiRISE: Erosional window into possible playa deposits

An erosional window into possible playa deposits. This is within a large impact crater. Length of layers here might help determine it there is an alluvial or playa origin. Beautiful Mars series. [More at links]

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HiRISE: Nilosyrtis Mensae

Let us now contemplate Nilosyrtis Mensae. There is a fault attached to a trough here; both have the same orientation. This image helps us to understand stress fields on Mars. Beautiful Mars series. [More at links]

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HiRISE: Layers to behold

Layers to behold. A scarp and more on layered deposits in Ceti Mensa. Beautiful Mars series. [More at links]

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HiRISE: Of dunes and their stories

Of dunes and their stories. So far no seasonal changes have been detected here, making this site unique. Beautiful Mars series. [More at links]

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HiRISE: Once in a blue dune

Sand dunes often accumulate in the floors of craters. In this region of Lyot Crater there is a field of classic barchan dunes. Just to the south of the group of barchan dunes is one large dune with a more … 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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HiRISE: Bang and whoosh!

This HiRISE image captures a new, dated (within about a decade) impact crater that triggered a slope streak. When the meteoroid hit the surface and exploded to make the crater, it also destabilized the slope and initiated this avalanche. The … Continue reading

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HiRISE: East Endeavour Crater dune field monitoring

East Endeavour Crater dune field monitoring. We’re monitoring to detect surface change of dunes shown to be active from past HiRISE observations. Beautiful Mars series. [More at links]

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HiRISE: A volcano — of mud or lava?

This image shows a hill with a central crater. Such features have been interpreted as both mud volcanoes (really a sedimentary structure) and as actual volcanoes (the erupting lava kind). They occur on the floor of Valles Marineris below a … Continue reading

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