Tag Archives: alluvial fan deposits

Nirgal Vallis flow built an alluvial fan in Uzboi Vallis relatively recently

Posted on June 27, 2018 by rburnham

[Editor’s note: From a paper by Sharon Wilson and three co-authors recently published in the Journal of Geophysical Research.] • We identify and characterize a deposit (upper and lower units) on the floor of Uzboi Vallis near the confluence of … Continue reading →

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HiRISE: Alluvial fan in Murray Crater

Posted on May 23, 2018 by rburnham

Alluvial fan in Murray Crater. Alluvial fans are among the strongest lines of evidence that liquid water once flowed on the surface of Mars. Beautiful Mars series. [More at links]

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HiRISE: Alluvial fans in NE Mojave Crater

Posted on April 24, 2018 by rburnham

Alluvial fans in northeastern Mojave Crater. Mojave Crater is a perennial favorite of ours for the clear signs of these alluvial fans that might indicate it once rained on Mars a very long time ago. Beautiful Mars series. [More at links]

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Stepped fans and phyllosilicates on Mars

Posted on April 2, 2018 by rburnham

Planetary Geomorphology Image of the Month, April 1, 2018: Peter Grindrod (Natural History Museum, London, UK). A number of different studies have catalogued features on Mars that could be given the general heading of sedimentary fans… These features occur whenever … Continue reading →

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HiRISE: Big fans

Posted on March 6, 2018 by rburnham

Alluvial fans are fan-shaped deposits emerging from regions of steep topography. Alluvial fans on Mars are thought to be ancient and record past episodes of flowing water. This image shows part of one of those fans, which has been eroded. … Continue reading →

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Curiosity: Profiling an finely layered outcrop

Posted on November 30, 2017 by rburnham

Sol 1890, November 30, 2017. Rover scientists commanded the Remote Micro-Imager’s long-range eye to take a 10-frame profile along the edge of a finely layered outcrop, possibly an alluvial fan-like deposit. Click the image to enlarge it. Sol 1890 raw … Continue reading →

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HiRISE: Stratified fan material in Baltisk Crater

Posted on July 31, 2017 by rburnham

Stratified fan material in Baltisk Crater. Beautiful Mars series.

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HiRISE: A closer look at Holden Crater

Posted on March 16, 2017 by rburnham

Holden Crater in southern Margaritifer Terra displays a series of finely layered deposits on its floor (white and light purple in an enhanced color image). The layered deposits are especially well exposed in the southwestern section of the crater where … Continue reading →

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HiRISE: Fans and crater floor deposits southeast of Vinogradov Crater

Posted on March 15, 2017 by rburnham

This white, purple, and pink surface is located on the floor of an impact crater on the southeast rim of the larger Vinogradov Crater in southern Margaritifer Terra. The surface consists of what is left of a series of thin … Continue reading →

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HiRISE: Old features and new

Posted on February 14, 2017 by rburnham

This image covers a portion of a typical impact crater in Terra Sirenum at about 40 degrees south latitude on Mars. At the top of the image, outside the crater rim, there is a mid-latitude mantle, rough in places where … Continue reading →

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