Tag Archives: outflow channels

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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THEMIS: Shalbatana Vallis

THEMIS Image of the Day, May 30, 2016. Today’s VIS image shows a small portion of Shalbatana Vallis, near the end of the channel where it drains into Chryse Planitia. Two streamlined islands are visible in this image and indicate … Continue reading

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THEMIS: Nilokeras Fossa

THEMIS Image of the Day, May 27, 2016. Today’s VIS image shows parallel sets of depressions. These are tectonic graben formed when a block of material is down dropped between paired faults. Nilokeras Fossa is located on the margin of … Continue reading

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THEMIS: Ares Vallis

THEMIS Image of the Day, May 10, 2016. This VIS image shows part of the complex channel floor of Ares Vallis. More THEMIS Images of the Day by geological topic.

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THEMIS: Impact-triggered landslide in Kasei Valles

THEMIS Image of the Day, April 8, 2016. This VIS image shows a small portion of Kasei Valles. The channel rim at the top of the image shows a complex series of processes. The crater was the source of the … Continue reading

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