Tag Archives: fluvial channels

HiRISE: Smooth and fractured deposits in Eridania valleys

The ancient highland channels in this image empty into the Eridania Basin (not visible), a large topographically low enclosure with smooth-appearing terrains that may have once contained a large paleolake or ancient sea. Water in these channels flowed to the … Continue reading

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THEMIS: Channels in Noachis Terra craters

THEMIS Image of the Day, January 11, 2017. This VIS image shows several channels in and around unnamed craters in Noachis Terra. (If the channels look more like tubes or worms, remember that the sunlight is coming from the right … Continue reading

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THEMIS: Branching channels of Arda Valles

THEMIS Image of the Day, December 29, 2016. Today’s false color image shows some of the many channels that make up Arda Valles. Their shape and meandering courses suggest that they were eroded by flowing streams or rivers. The THEMIS … Continue reading

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THEMIS: Channels in Arda Valles

THEMIS Image of the Day, December 15, 2016. The numerous, closely spaced channels in this VIS image are part of Arda Valles. Such valley networks point to flowing streams and rivers in the distant martian past. More THEMIS Images of … Continue reading

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THEMIS: Channels carving into Claritas Fossae

THEMIS Image of the Day, October 6, 2016. This VIS image shows several channels dissecting the higher elevations of Claritas Fossae. (Sunlight is coming from the right, as the image was taken in local morning, not long after sunrise.) More … Continue reading

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HiRISE: Channels in crater NE of Hellas Planitia

Channels in crater northeast of Hellas Planitia. Beautiful Mars series.

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Karun Valles & its braided alluvial fan

Planetary Geomorphology Image of the Month, September 29, 2016: Solmaz Adeli (DLR, Institute of Planetary Research, Berlin). The Amazonian period on Mars, meaning roughly the last 3 Ga, is globally believed to have been cold and hyperarid [e.g., Marchant and … Continue reading

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Mars had lakes & streams long after early wet era

Lakes and snowmelt-fed streams on Mars formed much later than previously thought possible, according to new findings using data primarily from NASA’s Mars Reconnaissance Orbiter. The recently discovered lakes and streams appeared roughly a billion years after a well-documented, earlier … Continue reading

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Fossil rivers suggest warm, wet ancient Mars

Extensive systems of fossilised riverbeds have been discovered on an ancient region of the Martian surface, supporting the idea that the now cold and dry Red Planet had a warm and wet climate about 4 billion years ago, according to … Continue reading

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HiRISE: Ancient streamlined islands of the Palos outflow channel

This image shows the northern terminus of an outflow channel located in the volcanic terrains of Amenthes Planum. The channel sources from the Palos impact crater to the south, where water flowed into the crater from Tinto Vallis and eventually … Continue reading

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HiRISE: Everchanging, neverchanging

Everchanging, neverchanging. Beautiful Mars series.

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HiRISE: Meandering channel on Hellas’ rim

The central portion of this image features a mildly-winding depression that was carved by water, likely around four billion years ago shortly after the Hellas basin formed following a giant asteroid or comet impact. Water would have flowed from the … Continue reading

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THEMIS: Evros Vallis

THEMIS Image of the Day, July 4, 2016. Today’s VIS image shows a small section of Evros Vallis. Evros Vallis is located in the northern part of Noachis Terra. More THEMIS Images of the Day by geological topic.

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THEMIS: Nanedi Valles

THEMIS Image of the Day, June 16, 2016. This VIS image shows both branches of Nanedi Valles, close to the point where they join to form a single channel. Nanedi Valles is located in Xanthe Terra. More THEMIS Images of … Continue reading

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THEMIS: Indus Vallis

THEMIS Image of the Day, June 15, 2016. This VIS image shows a portion of Indus Vallis. Indus Vallis is located in Terra Sabaea. More THEMIS Images of the Day by geological topic.

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