viernes, 2 de junio de 2017

ARTE MARCIANO || Active Flows on Steep Slopes in Ganges Chasma | NASA

Active Flows on Steep Slopes in Ganges Chasma | NASA

Active Flows on Steep 

Slopes in Ganges Chasma

Southwestern Ganges Chasma
This image from NASA's Mars Reconnaissance Orbiter 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 deposits: lobate flows that are relatively bright, sometimes with dark fringes, and very thin brownish lines that resemble recurring slope lineae (or 'RSL'). Both flows emanate from rocky alcoves. The RSL are superimposed on the lobate deposits (perhaps rocky debris flows), so they are younger and more active.
The possible role of water in forming the debris flows and RSL are the subjects of continuing debate among scientists. We will acquire more images here to see if the candidate RSL are active.
The map is projected here at a scale of 50 centimeters (19.7 inches) per pixel. [The original image scale is 52.9 centimeters (20.8 inches) per pixel (with 2 x 2 binning); objects on the order of 159 centimeters (62.6 inches) across are resolved.] North is up.
The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.
Image credit: NASA/JPL-Caltech/Univ. of Arizona
Last Updated: June 2, 2017
Editor: Tony Greicius

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