Tag Archives: north polar sand sea

THEMIS: Sea of sand in Siton Undae

THEMIS Image of the Day, April 20, 2016. Today’s VIS image shows part of Siton Undae, a dune field located near Escorial Crater and the north polar cap. More THEMIS Images of the Day by geological topic.

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THEMIS: More Olympia Undae

THEMIS Image of the Day, March 28, 2016. The arc shaped feature at the bottom of this VIS image is the remaining rim of a crater. The dunes of Olympia Undae have surrounded the rim and small individual dunes are … Continue reading

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THEMIS: Olympia Undae

THEMIS Image of the Day, March 25, 2016. This VIS image shows a small portion of Olympia Undae, a large dune field located near the north polar cap. More THEMIS Images of the Day by geological topic.

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THEMIS: Olympia Undae

THEMIS Image of the Day, March 23, 2016. This VIS image shows a small portion of Olympia Undae, an extensive dune field near the north polar cap. This image was collected during summer, so the dunes are free of surface … Continue reading

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HiRISE: Ice amid polar dunes

Atypical landform among dunes in a polar erg — There is a very unusual ice formation apparently growing in a flat spot between dunes of the polar erg. Located on the actual dune material and not in the inter-dune material. Beautiful … Continue reading

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HiRISE: Summer sand dunes

Mars’ permanent North Polar cap is ringed by sand dunes. In the winter and spring the dunes are covered by a seasonal cap of dry ice. Here, we see the dark dunes in the summer, bare of seasonal frost. Two … Continue reading

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HiRISE: Contact between polar ice & surroundings

Contact between polar ice and surrounding features. Beautiful Mars series.

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HiRISE: Erosion & deposition in Schaeberle Crater

Schaeberle Crater is a large, heavily-infilled crater with many interesting features. This image shows a window into the crater fill deposit, showcasing eroding bedrock and aeolian landforms. This pit is located near the geometric center of our image, making it … Continue reading

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THEMIS: Hyperboreae Undae

THEMIS Image of the Day, January 15, 2016. Today’s VIS image shows part of Hyperboreae Undae, a dune field located between the north polar cap and Escorial Crater. This image was taken during northern spring and the dunes still have significant … Continue reading

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THEMIS: Olympia Undae

THEMIS Image of the Day, November 12, 2015. This VIS image shows part of Olympia Undae, a large sand sea located near the north polar cap. This image was collected during northern spring. As the region warms in the sun, … Continue reading

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