Tag Archives: inverted topography

HiRISE: Martian meanders and scroll-bars

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

Posted in Reports | Tagged , , , , , , , , , , , , , , | Comments Off

HiRISE: Transition from depressed to inverted channels in Gorgonum Basin

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

Posted in Reports | Tagged , , , , , , , , | Comments Off

HiRISE: An inverted crater

There is a circular feature in this observation that appears to stand above the surrounding terrain. This feature is probably an inverted crater: a once-normal appearing impact crater that was filled in with sediment. The fill became indurated, or hardened, … Continue reading

Posted in Reports | Tagged , , , , , , , | Comments Off

HiRISE: North Hellas rock layers & sinuous ridge

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

Posted in Reports | Tagged , , , , , , , , , , , | Comments Off

HiRISE: Inverted terrain in Eridania Basin

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

Posted in Reports | Tagged , , , , , , , , | Comments Off

Inverted wadis on Earth: analogs for Mars

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

Posted in Reports | Tagged , , , | Comments Off

HiRISE: Inverted streams in the Aeolis region

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

Posted in Reports | Tagged , , , , , , , , | Comments Off

HiRISE: Inverted meandering rivers at possible future landing site

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

Posted in Reports | Tagged , , , , , , , , | Comments Off

HiRISE: Inverted channels on Saheki Crater fan

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

Posted in Reports | Tagged , , , , , , , , , , | Comments Off

HiRISE: Fine-branched ridges

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

Posted in Reports | Tagged , , , , , , , , , , | Comments Off