Tag Archives: dunes

HiRISE: Dunes on the floor of an infilled crater

Posted on March 8, 2017 by rburnham

Dunes on the floor of an infilled crater. Beautiful Mars series.

Posted in Reports | Tagged , , , , , , , | Comments Off

THEMIS: Waves of dunes on Proctor Crater floor

Posted on March 8, 2017 by rburnham

THEMIS Image of the Day, March 8, 2017. This VIS image shows the large dune field located on the floor of Proctor Crater in Noachis Terra. More THEMIS Images of the Day by geological topic.

Posted in Reports | Tagged , , , , , , , , , , | Comments Off

Mars winds carve mountains, move & raise dust

Posted on February 27, 2017 by rburnham

On Mars, wind rules. Wind has been shaping the Red Planet’s landscapes for billions of years and continues to do so today. Studies using both a NASA orbiter and a rover reveal its effects on scales grand to tiny on … Continue reading →

Posted in Reports | Tagged , , , , , , , , , , , , , | Comments Off

THEMIS: Noachis Terra dunes and gullies

Posted on February 23, 2017 by rburnham

THEMIS Image of the Day, February 23, 2017. This VIS image shows part of an unnamed crater in Noachis Terra. Large gullies dissect the crater rim and dunes are located on the crater floor. (If gullies look like ridges, remember … Continue reading →

Posted in Reports | Tagged , , , , , , , , , | Comments Off

HiRISE: Contrasting colors of crater dunes & gullies

Posted on February 3, 2017 by rburnham

Gullies are relatively common features in the steep slopes of crater walls, possibly formed by dry debris flows, movement of carbon dioxide frost, or perhaps the melting of ground ice. This example shows a section of crater wall from the … Continue reading →

Posted in Reports | Tagged , , , , , , , | Comments Off

THEMIS: Lines of dunes in Noachis Terra crater

Posted on February 2, 2017 by rburnham

THEMIS Image of the Day, Februrary 2, 2017. This VIS image shows sand dunes on the floor of an unnamed crater in Noachis Terra. Since Mars is universally dusty, the darker tone of the dunes shows they are relatively free … Continue reading →

Posted in Reports | Tagged , , , , , , , , , | Comments Off

THEMIS: Dune field in Hale Crater

Posted on February 1, 2017 by rburnham

THEMIS Image of the Day, February 1, 2017. Today’s VIS image shows a field of sand dunes on the floor of Hale Crater. Hale Crater is located in Noachis Terra north of Argyre Planitia. More THEMIS Images of the Day … Continue reading →

Posted in Reports | Tagged , , , , , , , , , | Comments Off

HiRISE: Dunes in northern summer

Posted on January 31, 2017 by rburnham

This dune field formed near the base of the North Polar cap. Dunes require a source of loose particulate material to form. The source of the northern dune fields around the polar cap may be from the layers of dusty … Continue reading →

Posted in Reports | Tagged , , , , , , , , , , | Comments Off

THEMIS: Field of dunes in Sumgin Crater

Posted on January 30, 2017 by rburnham

THEMIS Image of the Day, January 30, 2017. Today’s VIS image shows sand dunes on the floor of Sumgin Crater. The crater is located in Noachis Terra north of Argyre Planitia. The dunes’ darker tone suggests they are relatively dust-free … Continue reading →

Posted in Reports | Tagged , , , , , , , , , , , , | Comments Off

THEMIS: Crater channels, gullies, dunes & a pit

Posted on January 25, 2017 by rburnham

THEMIS Image of the Day, January 25, 2017. This VIS image shows part of an unnamed crater in Terra Cimmeria. The crater rim is dissected by gullies, and the central pit has several channels entering from the higher elevation of … Continue reading →

Posted in Reports | Tagged , , , , , , , , , , , , | Comments Off