• MODIS Pic of the Day 07 December 2021

    From Dan Richter@1:317/3 to All on Tue Dec 7 11:00:18 2021
    December 7, 2021 - Where Giants Roamed

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    Argentina, Rio Negro, Lago Sal Grande
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    Covering about 260,000 square miles (673,000 square kilometers) of the
    southern tip of Argentina, Patagonia has been called “South America’s
    southern frontier”, where “nature grows wild, barren, and beautiful”.

    This true-color image of a portion of northern Patagonia, acquired by
    the Moderate Resolution Imaging Spectroradiometer (MODIS) on board
    NASA’s Terra satellite on December 6, 2021, seems to validate that
    description. Colored in tans, browns, and ochre, and tinted with white
    swatches of salt pans, the semi-arid landscape is trisected by the
    confluence of the Limay River (south) and the Neuquén River (north) to
    form the Rio Negro. Several reservoirs dot the region, including Lake
    Los Barreales and Lake Mari Menuco, south of the Neuquén, Lake
    Pellegrini to its north, and Lake Ezequiel Ramos Mexia, formed by
    damming the Limay River.

    Today, the lakes and the land closest to the beautiful braided rivers
    attract substantial populations in many small cities, such as Neuquén,
    which sits at the confluence of the Neuquén and Limay, and General Roca
    on the northern banks of the Rio Negro. The floodplains provide rich,
    moist soil for agriculture, while lakes serve as recreation, fisheries,
    and tourist attractions. This region is also rich in oil reserves and
    is one of the few places outside parts of the United States where
    horizontal drilling and fracking methods are used to harvest that oil.

    In the past, however, this region was home to giants. From about 230
    million years ago until their extinction at the end of the Triassic
    Period (65 million years ago), dinosaurs were the dominant life form on
    Earth. They were so widespread, that fossils have been found on every
    continent, including Antarctica. Some of the richest fossil finds have
    been in certain locations in the deserts and badlands of North America,
    in a few sections of China, and in Argentina.

    This image captures one of the richest areas in Argentina, spreading
    from the deep red Candeleros Formation, sitting northwest of the
    Neuquén River to the rocks around the Lake Ezequiel Ramos Mexia. The
    first dinosaurs discovered in Patagonia were found in 1882, when a
    major in the Argentinian Army discovered some bones near the confluence
    of the Limay and Neuquén. Since that time, paleontologists have found
    the Candeleros rocks extremely rich in fossils, including ancient
    species of fish, frogs, snakes, turtles, small mammals, and several
    types of dinosaurs. One dinosaur found here is the Giganotosaurus
    carolinii—a carnivorous theropod thought to be larger and faster than
    Tyrannosaurs Rex.

    Image Facts
    Satellite: Terra
    Date Acquired: 12/6/2021
    Resolutions: 1km (287 KB), 500m (791.7 KB), 250m (1.7 MB)
    Bands Used: 1,4,3
    Image Credit: MODIS Land Rapid Response Team, NASA GSFC



    https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2021-12-07

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