Tag Archives: dunes

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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THEMIS: Herschel Crater floor in false color

THEMIS Image of the Day, February 19, 2019. This VIS image shows part of the floor of Herschel Crater. Sand dunes are visible at the bottom of the image. The dark blue in this false color image typically indicates basaltic … Continue reading

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THEMIS: Kaiser Crater dunes

THEMIS Image of the Day, February 15, 2019. This VIS image is located in Kaiser Crater and shows several individual dunes. These dunes’ dark tone suggests they are free of dust, hence active. With continued winds sand dunes will move … Continue reading

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THEMIS: High-latitude dune field

THEMIS Image of the Day, February 14, 2019. Today’s VIS image shows a dune field on a crater floor in Terra Cimmeria. Dunes at high latitudes – near the polar caps – are affected by seasonal frost and ice. The … Continue reading

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THEMIS: Noachis crater dunes

THEMIS Image of the Day, February 8, 2019. Sand dunes cover part of the floor of this unnamed crater in Noachis Terra. Their dark tint suggests they are relatively free of light-toned dust, hence probably active under winds currently. See … Continue reading

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