Tag Archives: dunes

THEMIS: Kaiser Crater dunes

THEMIS Image of the Day, April 23, 2019. This VIS image shows large individual dunes on the floor of Kaiser Crater. Small dark lines to the right of the sand dunes are the tracks made by dust devils as they … Continue reading

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HiRISE: Dunes in low southern latitudes

Dunes in low southern latitudes. The objective of this observation is to examine a small field of dunes. HiRISE Picture of the Day archive. [More at links]

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HiRISE: Bouncing boulders

Most debris on crater walls slides straight downhill. In this HiRISE image we see examples of boulders that have bounced downhill, not necessarily vertically. A prominent example looks like a dotted line from the top of the crater wall where … Continue reading

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THEMIS: Syrtis Major Planum in false color

THEMIS Image of the Day, April 5, 2019. This false-color VIS image is located in the center of Syrtis Major Planum. At the top of the image is Nili Patera, a volcanic summit. The sand dunes located near Nili Patera … Continue reading

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HiRISE: Frost-covered dunes

Frost-covered dunes. Sprinkled with hopes and dreams, no less. This is a relatively new monitoring site that seems to have heavy carbon-dioxide snowfall. HiRISE Picture of the Day archive [More at links]

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THEMIS: Dunes in a Noachis Terra crater

THEMIS Image of the Day, March 19, 2019. This VIS image shows part of the floor of an unnamed crater in Noachis Terra. Individual dunes and a large sand sheet with surface dune morphology fill a large area of the … Continue reading

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Winds of Jezero Crater

[Editor’s note: From a paper by Mackenzie Day and Taylor Dorn recently published in Geophysical Research Letters.] Wind in Jezero crater, Mars • Modern winds in Jezero crater come from the east, but ancient winds came from the southwest • … Continue reading

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HiRISE: Surface texture

Surface texture. Interesting how the dune ripples within these shallow craters all seem to have a similar orientation. This image is within a crater in the Arabia Terra region. HiRISE Picture of the Day archive [More at links]

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THEMIS: Crater dunes in Arabia Terra

THEMIS image of the Day, March 6, 2019. Today’s VIS image is located in Arabia Terra. The crater at the bottom of the image contains a large region of sand dunes. Dark blue in this band configuration indicates basaltic sand. … Continue reading

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HiRISE: Sinuous ridge in Peraea Cavus

A sinuous ridge in Peraea Cavus. In addition to the ridge, there’s also bright deposits here. A cavus is an irregular steep-sided depression usually in arrays or clusters. HiRISE Picture of the Day archive [More at links]

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