Tag Archives: Noachis Terra

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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THEMIS: Youngish crater in Noachis Terra

THEMIS Image of the Day, November 29, 2018. This VIS image shows half of an unnamed crater in Noachis Terra. The complex rim and rough floor are indicative of a relatively young crater. With time and erosion, craters fill in … Continue reading

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Evolution of Noachian highlands landscapes

[Editor’s note: From a paper by Jon Cawley and Ross Irwin recently published in the Journal of Geophysical Research.] Evolution of Escarpments, Pediments, and Plains in the Noachian Highlands of Mars • Debris‐mantled escarpments, regolith pediments, sloping aggradational surfaces, and … Continue reading

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THEMIS: Active dunes in Noachis Terra

THEMIS Image of the Day, November 28, 2018. Today’s VIS image shows a sand sheet with surface dunes forms on the floor of an unnamed crater in Noachis Terra. Dark dunes indicate active dunes: Winds stir the sand, which kicks … Continue reading

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THEMIS: Winding channel of Nirgal Vallis

THEMIS Image of the Day, November 26, 2018. Today’s VIS image shows a small section of Nirgal Vallis. Located in Noachis Terra, Nirgal Vallis was carved by water and forms one of the longest valley systems on Mars. See more … Continue reading

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THEMIS: Big dunes and little ones in Russell Crater

THEMIS Image of the Day, November 14, 2018. This VIS image shows part of the floor of Russell Crater, including sand dunes of mulitple sizes. Russell Crater is located in Noachis Terra. Do small dunes merge to become big ones? … Continue reading

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THEMIS: Sinuous features hint at ground ice

THEMIS Image of the Day, November 8, 2018. This VIS image is located in an unnamed crater in Noachis Terra. The sinuous feature near the bottom of the crater rim appears to have been caused by down slope movement of … Continue reading

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THEMIS: Crater floor infill and valley

THEMIS Image of the Day, November 2, 2018. This VIS image shows a large linear depression in the center of an unnamed crater in Noachis Terra. This crater and the nearby Maunder and Asimov craters share this odd morphology. The … Continue reading

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Mars Express: Greeley Crater in Noachis Terra

The surface of Mars may appear to be perpetually still, but its many features are ever-changing – as represented in this Mars Express view of the severely eroded Greeley impact crater. Greeley crater, named for the renowned planetary scientist Ronald … Continue reading

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HiRISE: Bedrock exposures in the highlands

Bedrock exposures in the highlands. The bedrock here is ancient. Beautiful Mars series. [More at links]

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