Tag Archives: outflow channels

THEMIS: Flood-sculpted ridge in Shalbatana Vallis

THEMIS Image of the Day, June 15, 2018. This VIS image shows a section of Shalbatana Vallis. Shalbatana Vallis is one of many channels that empty into Chryse Planitia. More THEMIS Images of the Day by geological topic.

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THEMIS: Dry waterfall at edge of Shalbatana Vallis?

THEMIS Image of the Day, June 7, 2018. This VIS image shows a section of Shalbatana Vallis. Shalbatana Vallis is located in Xanthe Terra. Shalbatana is an outflow channel carved by massive floods from escaping groundwater whose source lies far … Continue reading

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THEMIS: Echus Chasma mega-gullies

THEMIS Image of the Day, April 23, 2018. This VIS image shows one of the mega-gullies that empties into Echus Chasma. Echus Chasma is approximately 4km deep in this region, and is the source of Kasei Valles. More THEMIS Images … Continue reading

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THEMIS: Flood-scoured floor of Lobo Vallis

THEMIS Image of the Day, April 20, 2018. Today’s VIS image shows a small portion of Lobo Vallis near where it recombines with Kasei Valles and empties into Chryse Planitia. Kasei Valles is a huge channel system that drained the … Continue reading

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Giant channels carved by repeated small floods?

Geomorphologists who study Earth’s surface features and the processes that formed them have long been interested in how floods, in particular catastrophic outbursts that occur when a glacial lake ice dam bursts, for example, can change a planet’s surface, not … Continue reading

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THEMIS: Flood scours in Lobo Vallis

THEMIS Image of the Day, October 18, 2016. Today’s false color image shows part of Lobo Vallis, which is part of the larger Kasei Valles, a giant flood channel. The dark blue material is most likely basaltic sand. The THEMIS VIS … Continue reading

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HiRISE: A streamlined form in Lethe Vallis

This image shows a portion of Lethe Vallis, an outflow channel that also transported lava. Another investigation of this area (Balme et al., 2011) discovered a repeat pattern of dune-like forms in the channel interpreted as fluvial dunes (or, giant … 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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THEMIS: Flood-scoured Ravi Vallis

THEMIS Image of the Day, August 11, 2016. This VIS image is located in Ravi Vallis, a channel running from the highlands of Xanthe Terra to the complex lower elevation Hydraotes Chaos. The tear-drop shaped island near the center of … Continue reading

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THEMIS: Kasei Valles

THEMIS Image of the Day, August 8, 2016. This VIS image shows a portion of Kasei Valles. Kasei Valles is a large channel system that drained from the Tharsis volcanic highlands to the lower elevation Chryse Plainitia. At the top … Continue reading

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