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    Mars tagged posts

    Ancient, massive c could explain Martian geological mysteries

    July 20, 2017, Categories  Astronomy/Space

    A global false-color topographic view of Mars from the Mars Orbiter Laser Altimeter (MOLA) experiment. The spatial resolution is about 15 kilometers at the equator and less at higher latitudes, with a vertical accuracy of less than 5 meters. The figure illustrates topographic features associated with resurfacing of the northern hemisphere lowlands in the vicinity of the Utopia impact basin (at the near-center of the image in blue). Credit: MOLA Science Team

    A global false-color topographic view of Mars from the Mars Orbiter Laser Altimeter (MOLA) experiment. The spatial resolution is about 15 kilometers at the equator and less at higher latitudes, with a vertical accuracy of less than 5 meters. The figure illustrates topographic features associated with resurfacing of the northern hemisphere lowlands in the vicinity of the Utopia impact basin (at the near-center of the image in blue). Credit: MOLA Science Team

    A colossal impact with a large asteroid early in Mars’ history may have ripped off a chunk of the northern hemisphere and left behind a legacy of metallic elements in the planet’s interior. The crash also created a ring of rocky debris around Mars that may have later clumped together to form its moons, Phobos and Deimos.

    The origin and ...

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    Study Estimates Amount of Water needed to carve Martian Valleys

    June 5, 2017, Categories  Astronomy/Space

    This is a depiction of Mars today and what a warm and wet ancient Mars might have looked like. Credit: Wei Luo, Northern Illinois University

    This is a depiction of Mars today and what a warm and wet ancient Mars might have looked like. Credit: Wei Luo, Northern Illinois University

    Findings suggest Mars had ocean, active hydrologic cycle. A new study led by Northern Illinois University geography professor Wei Luo calculates the amount of water needed to carve the ancient network of valleys on Mars and concludes the Red Planet’s surface was once much more watery than previously thought. The study bolsters the idea that Mars once had a warmer climate and active hydrologic cycle, with water evaporating from an ancient ocean, returning to the surface as rainfall and eroding the planet’s extensive network of valleys.

    Satellites orbiting Mars and rovers on its surface have provided scientists with convincing evidence that water helped...

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    ‘Halos’ discovered on Mars Widen Time Frame for Potential Life

    May 30, 2017, Categories  Astronomy/Space

    A mosaic of images from the navigation cameras on the NASA Curiosity rover shows “halos” of lighter-toned bedrock around fractures. These halos comprise high concentrations of silica and indicate that liquid groundwater flowed through the rocks in Gale crater longer than previously believed. Credit: NASA/JPL-Caltech

    A mosaic of images from the navigation cameras on the NASA Curiosity rover shows “halos” of lighter-toned bedrock around fractures. These halos comprise high concentrations of silica and indicate that liquid groundwater flowed through the rocks in Gale crater longer than previously believed. Credit: NASA/JPL-Caltech

    Lighter-toned bedrock that surrounds fractures and comprises high concentrations of silica – called “halos” – has been found in Gale crater on Mars, indicating that the planet had liquid water much longer than previously believed. “The concentration of silica is very high at the centerlines of these halos,” said Jens Frydenvang, a scientist at Los Alamos National Laboratory and the University of Copenhagen...

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    Paleolake Deposits on Mars might look like Sediments in Indonesia

    March 7, 2017, Categories  Astronomy/Space, Environment/Geology

    Lake Towuti, Indonesia. (A) Regional context for Lake Towuti on the island of Sulawesi in Indonesia. Red box indicates approximate location of part B. Background is the Ocean base map from ESRI et al. (2015). (B) Generalized geologic map of Lake Towuti and the surrounding area showing the dominance of ultramafic material. Map is modified from Costa et al. (2015). (C) Bathymetry of Lake Towuti showing the location of the two analyzed sediment cores at the distal margins of the Mahalona River delta (white dots labeled 4 for TOW4 and 5 for TOW5). River inputs are shown in thin blue lines, with the Mahalona River shown as a thick blue line. Credit: Goudge et al. and GSA Bulletin

    Lake Towuti, Indonesia. (A) Regional context for Lake Towuti on the island of Sulawesi in Indonesia. Red box indicates approximate location of part B. Background is the Ocean base map from ESRI et al. (2015). (B) Generalized geologic map of Lake Towuti and the surrounding area showing the dominance of ultramafic material. Map is modified from Costa et al. (2015). (C) Bathymetry of Lake Towuti showing the location of the two analyzed sediment cores at the distal margins of the Mahalona River delta (white dots labeled 4 for TOW4 and 5 for TOW5). River inputs are shown in thin blue lines, with the Mahalona River shown as a thick blue line. Credit: Goudge et al. and GSA Bulletin

    Timothy A...

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