Argentina - Chile: The beauty of our landscapes in the eyes of NASA - La belleza de nuestros paisajes en los ojos de la NASA - Llullaillaco volcano and Upsala glacier

Posted by Ricardo Marcenaro | Posted in | Posted on 12:05


Open your mind, your heart to other cultures
Abra su mente, su corazón a otras culturas
You will be a better person
Usted será una mejor persona
RM




The photos have a big map, click on there to enlarge it
Las fotos tienen un gran mapa, haga clic allí para ampliarla





The summit of South America’s Llullaillaco Volcano has an elevation of 6,739 meters (22,110 feet) above sea level, making it the highest historically active volcano in the world. The current stratovolcano—a cone-shaped volcano built from successive layers of thick lava flows and eruption products like ash and rock fragments—is built on top of an older stratovolcano. The last explosive eruption of the volcano, based on historical records, occurred in 1877.
This detailed astronaut photograph of Llullaillaco illustrates an interesting volcanic feature known as a couléeflow levees (image top right). Coulées are formed from highly viscous, thick lavas that flow onto a steep surface. As they flow slowly downwards, the top of the flow cools and forms a series of parallel ridges oriented at 90 degrees to the direction of flow (somewhat similar in appearance to the pleats of an accordion). The sides of the flow can also cool faster than the center, leading to the formation of wall-like structures known as (image center). Llullaillaco is also a well-known archaeological site; the mummified remains of three Inca children, ritually sacrificed 500 years ago, were discovered on the summit in 1999.
Astronaut photograph ISS022-E-8285 was acquired on December 9, 2009, with a Nikon D2Xs digital camera using an 800mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center. The image was taken by the Expedition 22 crew.International Space Station Program supports the laboratory as part of the ISS National Lab to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by William L. Stefanov, NASA-JSC. The image in this article has been cropped and enhanced to improve contrast. Lens artifacts have been removed. The
Instrument: 
ISS - Digital Camera










The Southern Patagonian Icefield of Argentina and Chile is the southern remnant of the Patagonia Ice Sheet that covered the southern Andes Mountains during the last ice age. This detailed astronaut photograph illustrates the terminus of one of the icefield’s many spectacular glaciers—Upsala Glacier, located on the eastern side of the icefield. Upsala is the third largest glacier in the icefield, and like most other glaciers in the region, it has experienced significant retreat over the past century.
This image was taken during spring in the Southern Hemisphere, and icebergs were calving from the glacier terminus into the waters of Lago Argentino (Lake Argentina, image right). Two icebergs are especially interesting because they retain fragments of the moraine (rock debris) that forms a dark line along the upper surface of the glacier. The inclusion of the moraine illustrates how land-based rocks and sediment may wind up in ocean sediments far from shore.
Moraines are formed from rock and soil debris that accumulate along the front and sides of a flowing glacier. The glacier is like a bulldozer that pushes soil and rock in front of it, leaving debris on either side. When two glaciers merge (image center), moraines along their edges can join to form a medial moraine that is drawn out along the upper surface of the new glacier.
The moraine can be carried intact to the terminus and included in icebergs that then float away, dropping the coarse debris as the iceberg melts. While the icebergs produced by Upsala Glacier do not reach an ocean, many current glaciers do. The existence of ancient glaciers and ice sheets is recorded by layers or pockets of coarse, land-derived sediments within finer-grained sea floor sediments that are located far from any current (or former) coastline.
Astronaut photograph ISS021-E-15243 was acquired on October 25, 2009, with a Nikon D2Xs digital camera fitted with a 400 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center. The image was taken by the Expedition 21 crew. The image in this article has been cropped and enhanced to improve contrast. Lens artifacts have been removed. The International Space Station Program supports the laboratory to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by William L. Stefanov, NASA-JSC.
Instrument: 
ISS - Digital Camera



Argentina - Chile: The beauty of our landscapes in the eyes of NASA - La belleza de nuestros paisajes en los ojos de la NASA - Llullaillaco volcano and Upsala glacier











You have an alphabetical guide in the foot of the page in the blog: solitary dog sculptor
In the blog: Solitary Dog Sculptor I, the alphabetical guide is on the right side of the page
Thanks

Usted tiene una guía alfabética al pie de la página en el blog: solitary dog sculptor
En el blog: Solitary Dog Sculptor I, la guia alfabética está en el costado derecho de la página
Gracias




Ricardo M Marcenaro - Facebook

Blogs in operation of The Solitary Dog:

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Solitary Dog Sculptor I:
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enviar materiales para publicar,
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Diario La Nación
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Cuenta Comentarista en el Foro:
Capiscum

My blogs are an open house to all cultures, religions and countries. Be a follower if you like it, with this action you are building a new culture of tolerance, open mind and heart for peace, love and human respect.

Thanks :)

Mis blogs son una casa abierta a todas las culturas, religiones y países. Se un seguidor si quieres, con esta acción usted está construyendo una nueva cultura de la tolerancia, la mente y el corazón abiertos para la paz, el amor y el respeto humano.

Gracias :)







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