Tag Archives: Holden Crater

HiRISE: Holden Crater impact ejecta

Posted on March 22, 2019 by rburnham

Holden Crater impact ejecta. Because Holden is such a massive crater (about 140-km in diameter), its ejecta certainly covers a wide area. This image focuses on a small portion of it, where we can see some diverse compositions. HiRISE Picture … Continue reading →

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HiRISE: Holden Crater dunes

Posted on February 5, 2018 by rburnham

Holden Crater dunes. 260 km above the surface. Black and white is 5 km across, enhanced color is less than 1 km. Beautiful Mars series.

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HiRISE: Lakebeds in Holden Crater

Posted on April 13, 2017 by rburnham

Holden Crater was once filled by at least two different lakes. The sediments deposited in those lakes are relatively light-toned where exposed, as we see in this observation. Each layer represents a different point in time and perhaps a changing … Continue reading →

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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: Cubism in western rim of Holden Crater

Posted on April 7, 2016 by rburnham

This image covers the western rim of Holden Crater during northern summer. Since Holden Crater is in the Southern hemisphere of Mars, the shadows are long in northern summer (southern winter). Where the crater rim is well illuminated, we can … Continue reading →

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HiRISE: Holden Crater dune topography

Posted on February 1, 2016 by rburnham

Holden Crater dune topography. Beautiful Mars series.

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HiRISE: Bedrock outcrops west of Holden Crater

Posted on July 30, 2014 by rburnham

Bedrock outcrops west of Holden Crater. Beautiful Mars series.

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Making fans all over

Posted on September 15, 2011 by rburnham

Water and sediment run downhill, on Earth and Mars alike. And when they do, they build broad alluvial (outwash) fans at the foot of slopes. But how fast do these fans accumulate? On Mars, at least, it looks like they … Continue reading →

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NASA’s long road to Gale Crater

Posted on September 9, 2011 by rburnham

If Gale Crater isn’t your favorite choice for a landing site for NASA’s next Mars rover, you can’t claim the choice was made hastily. The international community of Mars scientists thoroughly sifted the Red Planet to find a feasible landing … Continue reading →

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Down in the deltas

Posted on August 30, 2011 by rburnham

Although NASA passed over Eberswalde Crater to choose Gale Crater as the landing site for the Mars Science Laboratory (MSL), Eberswalde offers the best known example on Mars of a river delta built from sediment washed into a crater lake. … Continue reading →

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