Tag Archives: inverted channels

Inverted terrain shows ancient stream-flow details

Posted on September 18, 2017 by rburnham

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: Martian meanders and scroll-bars

Posted on March 1, 2017 by rburnham

This is a portion of an inverted fluvial channel in the region of Aeolis / Zephyria Plana, at the Martian equator. Channels become inverted when the sediments filling them become more resistant to erosion than the surrounding material. Here, the … Continue reading →

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HiRISE: Transition from depressed to inverted channels in Gorgonum Basin

Posted on October 11, 2016 by rburnham

This image shows a transition from depressed to inverted channels in the Gorgonum Basin. In the darker terrain, there are two channels that display depressed topography. As these two channels cross into the underlying brighter terrain, the channels now stand … Continue reading →

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HiRISE: North Hellas rock layers & sinuous ridge

Posted on May 24, 2016 by rburnham

North Hellas region layered rock and sinuous ridge exposures. Beautiful Mars series.

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HiRISE: Inverted terrain in Eridania Basin

Posted on February 11, 2016 by rburnham

The Eridania Basin is thought to have once contained a large sea. This image shows the Gorgonum Basin, which lies along the eastern edge of Eridania. Along this eastern boundary, the terrain is being eroded away to expose light-toned altered … Continue reading →

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Inverted wadis on Earth: analogs for Mars

Posted on February 1, 2016 by rburnham

Planetary Geomorphology Image of the Month, February 1, 2016: Abdallah Zaki (Ain Shams University). The evolution of inverted topography on Earth and Mars can result from surface armouring of the channel, infilling of channels/valleys by lava flows, and cementation of … Continue reading →

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HiRISE: Inverted streams in the Aeolis region

Posted on December 11, 2015 by rburnham

The sinuous ridges in this image display strong characteristics of ancient meandering riverbeds that are preserved as inverted topography (blue). The ancient river sediments that make up the ridges might have allowed fluids to produce cements (e.g., calcite or iron … Continue reading →

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HiRISE: Inverted meandering rivers at possible future landing site

Posted on December 3, 2015 by rburnham

This image contains interesting examples of crosscutting, sinuous and straight ridges. The ridge in the lower left of the image (orange) has gradual bends and well-defined positive relief, while the ridge in the upper right (blue) exhibits a degree of … Continue reading →

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HiRISE: Inverted channels on Saheki Crater fan

Posted on November 20, 2015 by rburnham

Inverted channels on fan in Saheki Crater. Beautiful Mars series.

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HiRISE: Fine-branched ridges

Posted on October 15, 2015 by rburnham

This image shows numerous branching ridges with various degrees of sinuosity. These branching forms resemble tributaries funneling and draining into larger channel trunks towards the upper portion of the scene. The raised relief of these branching ridges suggests that these … Continue reading →

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