Tag Archives: dunes

HiRISE: Bedrock riddles of Nili Fossae

Posted on September 4, 2019 by rburnham

This image of the Nili Fossae region, to the west of the great Isidis basin, shows layered bedrock with many impact craters. Nili Fossae is one of the most mineralogically important sites on Mars. Remote observations by the infrared spectrometer … Continue reading →

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HiRISE: Into the dune database

Posted on August 26, 2019 by rburnham

Into the dune database. Dunes are particularly suited to comprehensive planetary studies because they are abundant over a wide range of elevations and terrain types. Observations like this one are used to aid in classification and volume estimates of dunes … Continue reading →

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THEMIS: Frosty dunes in Hyperboreae Undae

Posted on August 5, 2019 by rburnham

THEMIS Image of the Day, August 5, 2019. Several dune fields encircle the north polar cap. Hyperboreae Undae is one of them, located near Escorial Crater and Chasma Boreale. This VIS image was taken during the spring season, when the … Continue reading →

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HiRISE: McLaughlin Crater dunes

Posted on July 23, 2019 by rburnham

McLaughlin Crater dunes. This image is part of a seasonal monitoring campaign to detect changes and quantify migration rates of the dunes in McLaughlin Crater. McLaughlin is one of the deepest craters on Mars, and was named after Dean B. … Continue reading →

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HiRISE: Proctor Crater dune field

Posted on July 18, 2019 by rburnham

Proctor Crater dune field. The dune field here in Proctor Crater is about 35 x 65 kilometers in size, and was one of the first sand dune fields ever recognized on Mars based on Mariner 9 images. HiRISE Picture of … Continue reading →

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HiRISE: Dunes within Arkhangelsky Crater

Posted on July 17, 2019 by rburnham

Dunes within Arkhangelsky Crater. Dark sand patches and dunes are likely to be active on the floor deposits of this 117-kilometer diameter impact crater. An additional goal is to look for changes from earlier HiRISE images. HiRISE Picture of the … Continue reading →

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HiRISE: Springtime for Russell Crater

Posted on July 15, 2019 by rburnham

Springtime for Russell Crater. Russell Crater is another favorite of ours, not only for its beauty, but also for the information it provides us for any changes due to sublimation, when a solid state changes directly to a gaseous one. … Continue reading →

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HiRISE: Watching the dune gullies

Posted on July 10, 2019 by rburnham

Watching the dune gullies. When dune gullies are as gorgeous as these, it’s an easy thing to want to continue to observe them for any seasonal changes. These are located in Matara Crater, a region that we’ve monitored before many … Continue reading →

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HiRISE: Dune footprints in Hellas Planitia

Posted on June 12, 2019 by rburnham

These curious chevron shapes in southeast Hellas Planitia are the result of a complex story of dunes, lava, and wind. Long ago, there were large crescent-shaped (barchan) dunes that moved across this area, and at some point, there was an … Continue reading →

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HiRISE: A song of dune and ice

Posted on June 5, 2019 by rburnham

A song of dune and ice. This image shows rare dunes superposed on elements of the polar cap near Olympia Undae, which is a vast dune field in the north polar region of Mars. HiRISE Picture of the Day archive. … Continue reading →

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