Tag Archives: fluvial landforms

THEMIS: Rolling down into Argyre Planitia

THEMIS Image of the Day, November 27, 2018. Today’s VIS image shows several small channels. These channels are along the break in topography, that leads down into Argyre Planitia. Argyre Planitia and Hellas Planitia are deep basins in the southern … Continue reading

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THEMIS: Channels flowing from a ridge

THEMIS Image of the Day, November 9, 2018. This VIS image is located in Terra Sirenum. The bright linear feature at the bottom of the image is the crest of a ridge. The multiple channel features toward the top of … Continue reading

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Mars & Earth river deltas branch in similar ways

Planetary Geomorphology Image of the Month, October 16, 2018: Robert C. Mahon (University of New Orleans). Which morphologic features of sedimentary systems persist into the stratigraphic record? Ancient river deltas preserved as stratigraphic deposits on both Earth and Mars exhibit … Continue reading

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HiRISE: Fan with inverted channels

This image shows inverted channels within a fan whose origin could be either fluvial (produced by the action of a stream) or alluvial (created by sedimentary deposits). If the fan is alluvial, then it formed on dry land. If the … Continue reading

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The largest delta on Mars?

Planetary Geomorphology Image of the Month, September 1, 2018: Jacob Adler (Arizona State University). Ancient river deltas are found in many locations on Mars [see Di Achile & Hynek, 2010 and references therein], and are formed as sediment drops out … Continue reading

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River and lake landforms in Melas Chasma

[Editor’s note: From a paper by Joel Davis and five co-authors recently published in the Journal of Geophysical Research.] Episodic and Declining Fluvial Processes in Southwest Melas Chasma, Valles Marineris, Mars • Episodic fluvial processes occurred in the southwest Melas … Continue reading

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THEMIS: Winding channel of Nanedi Valles

THEMIS Image of the Day, March 30, 2018. This VIS image shows a section of Nanedi Valles, located in Xanthe Terra. More THEMIS Images of the Day by geological topic.

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Inverted terrain shows ancient stream-flow details

River deposits exist across the surface of Mars and record a surface environment from over 3.5 billion years ago that was able to support liquid water at the surface. A region of Mars named Aeolis Dorsa contains some of the … Continue reading

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HiRISE: Cataracts in Kasei Valles

Obviously these are not the kind of cataracts that can develop in the lenses of your eyes, but large erosional scallops that form in river channels, like the Niagara Falls draining the Great Lakes of North America. Cataracts are large … Continue reading

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HiRISE: Distinctive brightness

This full-resolution image is centered on a bright deposit at the end of a gully channel. The bright deposit does not seem to be present in an image acquired several years earlier than 2009, and is likely to be very … Continue reading

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