Tag Archives: streamlined islands

THEMIS: Streamlined islands in Athabasca Valles

THEMIS Image of the Day, July 2, 2019. This VIS image shows part of the channel called Athabasca Valles. Several streamlined islands are visible at the top of the image. The source of the flood was likely an outburst of … Continue reading

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HiRISE: Cored island

Cored island. This channel may have been used by both lava and water. One of the processes produced a crater-cored island and later, the downstream side was eroded away, leaving knobs and an inverted streamlined form. Beautiful Mars series. [More … Continue reading

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HiRISE: All that the lava leaves behind

All that the lava leaves behind. There are streamlined and eroded forms in this lava channel, a region with very little HiRISE coverage. Beautiful Mars series. [More at links]

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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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