Tag Archives: sand dunes

THEMIS: Dune patch in a Sirenum crater

THEMIS Image of the Day, January 29, 2019. A field of sand dunes is visible on the floor of this unnamed crater. The crater is located in Terra Sirenum. See more THEMIS Images of the Day by geological subject.

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HiRISE: A first look at dunes

This image shows us a cross-section of a dune field. Dune shape depends on several factors, including the amount of sand present and the local wind directions. This dune field displays several distinct dune morphologies. We see both individual barchan-like … Continue reading

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HiRISE: The source of dunes in Chasma Boreale

The source of dunes in Chasma Boreale. This image shows dunes during the summer, when they were free from the seasonal layer of carbon dioxide ice that covers the region for much of the year. These dunes, which are near … Continue reading

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THEMIS: Terra Sirenum crater dunes

THEMIS Image of the Day, January 3, 2019. Dark dunes fill part of the floor of this unnamed crater in Terra Sirenum. There are numerous gullies on the rim of the crater. Winds are moving the sand towards the upper … Continue reading

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Dunes decrease in size at high southern latitudes, likely from ground ice cementation

[Editor’s note: From a paper by Maria Banks and seven co-authors recently published in the Journal of Geophysical Research.] Patterns in Mobility and Modification of Middle‐ and High‐Latitude Southern Hemisphere Dunes on Mars • The mobility of dunes and ripples … Continue reading

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THEMIS: Dunes on the move in Aonia Terra

THEMIS Image of the Day, December 28, 2018. Located in the center of this VIS image is a group of sand dunes. With enough wind and sand, sand dunes are formed. Dune morphology typically has a shallow slope on the … Continue reading

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THEMIS: Sand sheet in Halley Crater

THEMIS Image of the Day, December 24, 2018. This VIS image shows part of the dune field on the floor of Halley Crater. Rather than small individual sand dunes, the sand here is collected into a sand sheet and dune … Continue reading

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THEMIS: On the edge of the south polar ice cap

THEMIS Image of the Day, December 20, 2018. At the bottom of this image is the layered edge of the south polar cap. There are more layers visible between the bright polar material and the dark sand dunes at the … Continue reading

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THEMIS: Tapestry of dunes in Proctor Crater

THEMIS Image of the Day, December 14, 2018. This VIS image shows part of the extensive dune field on the floor of Proctor Crater. Proctor Crater is located in Noachis Terra. See more THEMIS Images of the Day by geological … Continue reading

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THEMIS: Active dune field in Noachis

THEMIS Image of the Day, December 13, 2018. Today’s VIS image shows sand dunes on the floor of an unnamed crater in Noachis Terra. These dunes are likely active because they are dark, indicating that they move often enough to … Continue reading

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