Tag Archives: RSL

HiRISE: Strata always have a story

Posted on April 4, 2018 by rburnham

Strata always have a story. This area is located within the massive Valles Marineris canyon system, and was suggested to monitor for recurring slope lineae on a slope to the south, but we thought the gorgeous bedrock deserved to be … Continue reading →

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RSLs are flowing sand, not water?

Posted on November 27, 2017 by rburnham

Dark features previously proposed as evidence for significant liquid water flowing on Mars have now been identified as granular flows, where sand and dust move rather than liquid water, according to a new article published in Nature Geoscience by the … Continue reading →

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Water ice is buried near Mars equator in small areas

Posted on August 17, 2017 by rburnham

A re-analysis of data from the Neutron Spectrometer on NASA’s Mars Odyssey orbiter has nearly doubled the data’s resolution. The higher-resolution data show that small deposits of water ice lie buried at shallow depths near the martian equator in several … Continue reading →

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HiRISE: Gullies and craters and dunes, oh my!

Posted on June 2, 2017 by rburnham

This unnamed, approximately 30-kilometer diameter crater, formed in the Southern highlands of Mars. Our image shows regions of geologic diversity within, making this an interesting spot for scientists to study how different Martian processes interact with each other. Gullies, or … Continue reading →

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HiRISE: Active flows on steep slopes in Ganges Chasma

Posted on May 31, 2017 by rburnham

This image covers a steep west-facing slope in southwestern Ganges Chasma, north of the larger canyons of Valles Marineris. The spot was targeted both for the bedrock exposures and to look for active slope processes. We see two distinct flow … Continue reading →

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HiRISE: Seasonal flows in Valles Marineris

Posted on May 4, 2017 by rburnham

Recurring slope lineae (RSL) are seasonal flows on warm slopes, and are especially common in central and eastern Valles Marineris. This image covers a large area full of interesting features, but the enhanced color closeup highlight some of the RSL. … Continue reading →

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HiRISE: Colorful equatorial gullies in Krupac Crater

Posted on May 2, 2017 by rburnham

Although large gullies (ravines) are concentrated at higher latitudes, there are gullies on steep slopes in equatorial regions. An enhanced-color closeup shows part of the rim and inner slope of Krupac Crater located just 7.8 degrees south of the equator. … Continue reading →

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HiRISE: Seasonal flows on warm slopes

Posted on March 9, 2017 by rburnham

Recurring Slope Lineae (called “RSL”) are seasonally-repeating dark flows that are active at the warmest times of the year. Some of these grow from the top of the steep slope downwards as expected for liquid or granular flows. Others show … Continue reading →

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HiRISE: Slope streaks or recurring slope lineae?

Posted on December 16, 2016 by rburnham

The image shows a region we see many slope streaks, typically dark features on slopes in the equatorial regions on Mars. They may extend for tens of meters in length and gradually fade away with time as new ones form. … Continue reading →

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THEMIS: Gullies, ejecta at Palikir Crater

Posted on October 27, 2016 by rburnham

THEMIS Image of the Day, October 27, 2016. Today’s VIS image is of Palikir Crater in Terra Sirenum. The inner rim of the crater is dissected with numerous gullies. In higher resolution images from other imagers these gullies are the … Continue reading →

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