Tag Archives: periglacial processes

HiRISE: Crater immediately east of Biblis Patera

A crater immediately to the east of Biblis Patera. Some questions include: (a) what is the “deposit” on the west side of the crater, seeming to cover the wall/floor interface? (b) what is the floor material; did lava come up … Continue reading

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HiRISE: Gullies and crevasses on a mesa

Gullies and crevasses on a mesa. Beautiful Mars series. [More at links]

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HiRISE: Crater in the aureole of Pavonis Mons

A crater in the aureole of Pavonis Mons. This is an unusual crater in the Pavonis Mons aureole, possibly a glacial deposit. It appears to have secondaries or textured ejecta (sign of freshness), but is mostly infilled. It also has … Continue reading

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THEMIS: Sinuous features hint at ground ice

THEMIS Image of the Day, November 8, 2018. This VIS image is located in an unnamed crater in Noachis Terra. The sinuous feature near the bottom of the crater rim appears to have been caused by down slope movement of … Continue reading

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HiRISE: Curving pits and ridges

This terrain is unusual for the South Polar region of Mars, with a set of curved ridges of unknown origin. Small pits are present, often concentrated on the ridges, that may have resulted from sublimation of ice. [More at link]

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THEMIS: Soft-featured craters in Arcadia Planitia

THEMIS Image of the Day, October 19, 2018. This false-color VIS image shows some of the plains and craters located in Arcadia Planitia. The soft-looking features in the impact craters indicate ground ice at shallow depths below the surface. In … Continue reading

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HiRISE: The walls in Milankovic Crater

The walls in Milankovic Crater. The objective of this observation is to determine the nature of depressions in the mantle on the wall of Milankovic Crater. It seems that the deeper depressions into the mantle have a straight edge along … Continue reading

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HiRISE: Crazy terrain in Utopia

That crazy terrain. This is the floor of a crater in Utopia Planitia. Beautiful Mars series. [More at links]

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THEMIS: Active dunes and ground-ice creep

THEMIS Image of the Day, August 3, 2018. This VIS image is located in the region between northern Terra Sabaea and Utopia Planitia. This unnamed crater contains a small, dark dune field. Darkness suggests the dunes are dust-free, hence probably … Continue reading

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HiRISE: It’s all about that flow

It’s all about that flow. There are a number of crevasse-like features here. Beautiful Mars series. [More at links]

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