Tag Archives: Valles Marineris

HiRISE: Dunes in Nectaris Montes

Sand dunes in Valles Marineris can be impressive in size, with steep slopes that seem to climb and descend. An enhanced-color cutout shows some of these on the slopes of Nectaris Montes within Coprates Chasma. The brighter bedforms are inactive … Continue reading

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HiRISE: Strata always have a story

Strata always have a story. This area is located within the massive Valles Marineris canyon system, and was suggested to monitor for recurring slope lineae on a slope to the south, but we thought the gorgeous bedrock deserved to be … Continue reading

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Stepped fans and phyllosilicates on Mars

Planetary Geomorphology Image of the Month, April 1, 2018: Peter Grindrod (Natural History Museum, London, UK). A number of different studies have catalogued features on Mars that could be given the general heading of sedimentary fans… These features occur whenever … Continue reading

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THEMIS: Mega-gullies of Louros Valles

THEMIS Image of the Day, March 2, 2018. Ius Chasma is unique from the other chasmata of Valles Marineris in possessing mega-gullies on both sides of the chasma. The largest mega-gullies are located in Sinai Planum, dissecting those plains and … Continue reading

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THEMIS: Sapping gullies in Louros Valles

THEMIS Image of the Day, March 1, 2018. Ius Chasma is unique from the other chasmata of Valles Marineris in possessing mega gullies on both sides of the chasma. The largest mega gullies are located in Sinai Planum, dissecting those … Continue reading

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THEMIS: Colliding landslides in Ius Chasma

THEMIS Image of the Day, February 28, 2018. This VIS image shows the eastern end of Ius Chasma. The southern canyon wall is at the bottom of the image, with dark sand and sand dunes. The presence of mobile sand … Continue reading

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THEMIS: Eroding landslide in Ius Chasma

THEMIS Image of the Day, February 27, 2018. This VIS image shows part of the eastern end of Ius Chasma. Geryon Montes are located in the bottom half of the image. Between the montes and the southern wall face is … Continue reading

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THEMIS: Possible delta in Ius Chasma?

THEMIS Image of the Day, February 26, 2018. This VIS image shows part of eastern Ius Chasma. The lower elevations of Geryon Montes are located at the top of the image. Between the montes and the southern wall face is … Continue reading

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THEMIS: Dunes in Ius Chasma

THEMIS Image of the Day, February 23, 2018. Continuing eastward thru central Ius Chasma, this image shows a section of chasma that is not dominated by landslide deposits. Geryon Montes, in the upper half of the image, has several visible … Continue reading

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THEMIS: Geryon Montes and tectonic widening of Ius Chasma

THEMIS Image of the Day, February 22, 2018. Moving into the central part of Ius Chasma, the canyon profile changes. What started as a large graben south of the main chasma wall, has widened to create a central high ridge … Continue reading

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