Tag Archives: inverted channels

HiRISE: Branched ridges in NE Arabia Terra

Branched ridges in northeast Arabia Terra. Could these features be inverted stream channels and a depositional (alluvial) fan? Beautiful Mars series. [More at links]

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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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HiRISE: Semi-sinuous ridge and stratified material in Arabia Terra

Semi-sinuous ridge and stratified material in Arabia Terra. Looks like inverted stream channels that contributed to a lake or pond, with stratified sedimentary rock units in the depression. Important imaging for understanding how to best distinguish cratered, erosion-resistant sedimentary rock … Continue reading

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HiRISE: Inverted channel on elevated terrain

An inverted channel on elevated terrain. Interesting fluvial processes that might help improve our understanding of the deposits in the Medusae Fossae Formation. Beautiful Mars series. [More at links]

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HiRISE: Inverted channels

Inverted channels at the boundary of highlands and intercrater plains. This image targets inverted channels located at the boundary between Noachian highlands and Noachian intercrater plains bedrock. These channels are 200 to 500 meters wide, implying substantial fluvial activity. High-resolution … Continue reading

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HiRISE: Big fans

Alluvial fans are fan-shaped deposits emerging from regions of steep topography. Alluvial fans on Mars are thought to be ancient and record past episodes of flowing water. This image shows part of one of those fans, which has been eroded. … Continue reading

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HiRISE: Inverted channel in Eberswalde Crater

An inverted channel in Eberswalde Crater. Eberswalde Crater was once a final candidate landing site for the Mars Science Laboratory rover, Curiosity. Although the primary scientific interest in Eberswalde is its well-preserved delta, this sinuous river channel to the southeast, … Continue reading

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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: 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

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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

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