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File:Upsala Glacier, Argentina.jpg

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Summary

Description
English: 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 ice-field’s many spectacular glaciers—Upsala Glacier, located on the eastern side of the ice-field.

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 centre), moraines along their edges can join to form a medial moraine that is drawn out along the upper surface of the new glacier.
Date Taken on 25 October 2009
Source NASA Earth Observatory
Author

This image was taken by the NASA Expedition 21 crew

  • Image acquired 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 Centre.
Camera location49° 54′ 00″ S, 73° 18′ 00″ W  Heading=292.5° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: ISS021-E-15243.

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Licensing

Public domain
This file is in the public domain in the United States because it was created by the Image Science & Analysis Laboratory, of the NASA Johnson Space Center. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA media use guidelines or Conditions of Use of Astronaut Photographs). Photo source: ISS021-E-15243.

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inception

25 October 2009

coordinates of the point of view

49°54'0.000"S, 73°18'0.000"W

heading: 292.5 degree

exposure time

0.0005 second

focal length

400 millimetre

media type

image/jpeg

File history

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Date/TimeThumbnailDimensionsUserComment
current17:13, 3 February 2017Thumbnail for version as of 17:13, 3 February 20174,288 × 2,848 (4.91 MB)Ras67new rendered in high quality from NASA's raw image data (with 5500 K)
09:32, 9 June 2010Thumbnail for version as of 09:32, 9 June 20103,072 × 2,032 (5.45 MB)Originalwanahigher res
11:01, 17 November 2009Thumbnail for version as of 11:01, 17 November 20091,440 × 960 (942 KB)Originalwana{{Information |Description={{en|1=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

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