Tag Archives: Valles Marineris

HiRISE: Pitted material and mounds

Pitted material and mounds in Chryse Planitia. This rough-looking material has many meter-length pits. What exactly is this stuff? Chryse Planitia shows evidence of water erosion in the past, and is the bottom end for many outflow channels from the southern … Continue reading

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THEMIS: Landslide in Melas Chasma

THEMIS Image of the Day, October 29, 2018. Today’s VIS image shows part of the northern cliff face of Melas Chasma and the large landslide deposits at the base of the cliff face. The landslide deposits are called Ophir Labes. … Continue reading

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THEMIS: Ophir Chasma in false color

THEMIS Image of the Day, September 5, 2018. Today’s VIS image shows part of Ophir Chasma, where landslide debris mingles with probable sediments from long-vanished lakes. The THEMIS VIS camera contains 5 filters. The data from different filters can be … Continue reading

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River and lake landforms in Melas Chasma

[Editor’s note: From a paper by Joel Davis and five co-authors recently published in the Journal of Geophysical Research.] Episodic and Declining Fluvial Processes in Southwest Melas Chasma, Valles Marineris, Mars • Episodic fluvial processes occurred in the southwest Melas … Continue reading

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THEMIS: And the rocks came tumbling down

THEMIS Image of the Day, August 1, 2018. This VIS image is located in central Ganges Chasma. A large landslide deposit fills the top third of the image. The radial grooves on the top of the landslide are a common … Continue reading

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THEMIS: Slide debris and layered deposits in Ophir Chasma

THEMIS Image of the Day, July 13, 2018. Today’s VIS image shows part of Ophir Chasma. Ophir Chasma is part of Valles Marineris, the largest canyon system on Mars. At the top of the image is a portion of a … Continue reading

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THEMIS: Faulting and landslides in Tithonium Chasma

THEMIS Image of the Day, June 28, 2018. This VIS image shows the eastern edge of Tithonium Chasma, one of the large valley systems that comprise Valles Marineris. Large fractures are visible on the upper margin of the chasma. Downward … Continue reading

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THEMIS: Hebes Mensa

THEMIS Image of the Day, June 13, 2018. Located in the center of Hebes Chasma is a large deposit of layered material called Hebes Mensa. Extensive erosion has created gullies in the mensa and distributed fine sand size materials to … Continue reading

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HiRISE: A volcano — of mud or lava?

This image shows a hill with a central crater. Such features have been interpreted as both mud volcanoes (really a sedimentary structure) and as actual volcanoes (the erupting lava kind). They occur on the floor of Valles Marineris below a … Continue reading

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THEMIS: Landslide debris and dunes in Coprates Chasma

THEMIS Image of the Day, June 8, 2018. Today’s VIS image shows part of the wall and floor of Coprates Chasma. Several landslide deposits are visible as well as small regions of sand dunes. More THEMIS Images of the Day … Continue reading

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