Tag Archives: inverted topography

HiRISE: Transition

Posted on July 1, 2019 by rburnham

Transition. This image shows where a fluvial channel changes from a depression to an inverted high standing channel in Terra Sirenum. That change likely marks the spot where the material was possibly elevated and more resistant to erosion. HiRISE Picture … Continue reading →

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HiRISE: Resistant lava and erosion

Posted on May 15, 2019 by rburnham

This image demonstrates the curious phenomenon called “topographic inversion.” The southern half of the picture is covered by a well-preserved lava flow. The flow stops just at the brink of descending a steep slope. Lava isn’t afraid of falling, so … Continue reading →

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HiRISE: Layers and ridges along Huo Hsing Vallis

Posted on May 3, 2019 by rburnham

Layers and ridges along Huo Hsing Vallis. The objective of this observation is to examine layers and ridges along Huo Hsing Vallis. Layers are especially evident in buttes next to a crater. Many fine networks of ridges may be inverted … Continue reading →

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HiRISE: Positive relief features in Xanthe Terra

Posted on January 28, 2019 by rburnham

Positive relief features in Xanthe Terra. These relief features, which are positively gorgeous, might be inverted streams. Xanthe Terra is a large area on Mars, centered just north of the Martian equator. HiRISE Picture of the Day archive [More at … Continue reading →

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HiRISE: Branched ridges in NE Arabia Terra

Posted on November 26, 2018 by rburnham

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: Ridges in Terra Sabaea crater

Posted on November 8, 2018 by rburnham

Ridges in Terra Sabaea. The objective of this observation is to determine the nature of ridges on a crater floor.  They may represent inverted terrain. Beautiful Mars series. [More at links]

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HiRISE: Fan with inverted channels

Posted on September 6, 2018 by rburnham

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

Posted on August 15, 2018 by rburnham

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

Posted on August 2, 2018 by rburnham

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: Within an inverted impact crater

Posted on June 5, 2018 by rburnham

Within an inverted impact crater in Vastitas Borealis. This particular crater is characterized by a central deposit of positive relief with a subdued rim as a result of sublimation in the surrounding territory. A comprehensive study of inverted impact craters … Continue reading →

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