Tag Archives: streamlined islands

HiRISE: Platy flow in Elysium Planitia

A channel segment amid platy-ridged flows in central Elysium Planitia. Beautiful Mars series.

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HiRISE: Landslide!

This image finally completes a stereo pair with another observation acquired in 2007. It shows a fresh (well-preserved) landslide scarp and rocky deposit off the edge of a streamlined mesa in Simud Valles, a giant outflow channel carved by ancient … Continue reading

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HiRISE: Long and winding channel in Tharsis

The Tharsis region of Mars is covered in vast lava flows, many with channels. Some channels, however, resemble features that may have been formed by water. In this image, we see a smooth, flat-bottomed channel within the roughly irregular edges … Continue reading

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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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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: 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: Kasei Valles

THEMIS Image of the Day, February 12, 2016. This VIS image shows a very small portion of Kasei Valles. There are several streamlined islands near the center of the image. The wider part of the island is to the left … Continue reading

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THEMIS: Hebrus Valles

THEMIS Image of the Day, January 12, 2016. This VIS image shows a portion of Hebrus Valles. This channel system was formed by liquid flow of either water or lava, or a combination of both. There is a streamlined island … Continue reading

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