Search Results for: rsl

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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Mars gullies not carved by flowing water?

Posted on July 29, 2016 by rburnham

New findings using data from NASA’s Mars Reconnaissance Orbiter show that gullies on modern Mars are likely not being formed by flowing liquid water. This new evidence will allow researchers to further narrow theories about how Martian gullies form, and … Continue reading →

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Opportunity field report, June 20, 2016

Posted on June 22, 2016 by rburnham

Sol 4410, June 20, 2016; Rover Field Report by Larry Crumpler, MER Science Team & New Mexico Museum of Natural History & Science: Opportunity is finishing up its activities here in Marathon Valley on the western rim of the 22 km-diameter … Continue reading →

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Salty flows on Mars

Posted on January 1, 2016 by rburnham

Planetary Geomorphology Image of the Month, December 31, 2015: Lujendra Ojha (Georgia Institute of Technology). Recurring slope lineae (RSL) are dark, narrow features forming on present-day Mars that have been suggested to be a result of transient flowing water. RSL … Continue reading →

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HiRISE: Slope streak cluster formation

Posted on October 9, 2015 by rburnham

Slope streak cluster formation. These are not RSL, but dark streaks created by dislodged material, such as falling rocks or boulders. Beautiful Mars series.

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HiRISE: Seasonal flows in Asimov Crater

Posted on May 21, 2015 by rburnham

Seasonal flows called recurring slope lineae (RSL) grow down warm slopes in the summer, fade when they become inactive, then re-form the following year when the slopes warm up again from the Sun. We see many of these RSL over … Continue reading →

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HiRISE: Warm-season flows in cold-season ravines

Posted on May 13, 2015 by rburnham

Ravines (or very large gullies) are actively forming on Mars during the coldest times of year, when carbon dioxide frost aids mass wasting. However, some of these ravines also show activity in the warmest time of year, in the form … Continue reading →

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HiRISE: Slope monitoring in Aram Chaos

Posted on April 24, 2015 by rburnham

A previous image, ESP_025954_1835 showed some striking dark downslope flows. Since this is a dark, low-dust setting, these are probably not slope streaks (which form in bright dusty areas). This image can provide us with another look, particularly in order … Continue reading →

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HiRISE: Seasonal flows at Hale Crater central peak

Posted on April 9, 2015 by rburnham

Recurring slope lineae (RSL) are active flows on warm Martian slopes that might be caused by seeping water. One of the most active sites known on Mars in in the central peaks (uplifted mountains of deep bedrock) of Hale Crater. … Continue reading →

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HiRISE: Recurring slope lineae in Raga Crater

Posted on March 13, 2015 by rburnham

This image covers Raga Crater, the location of well-studied recurring slope lineae (RSL). RSL are dark flows that disappear and re-form every Mars year at certain locations. A closeup image compares the dark flows at the same time in three … Continue reading →

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