File:Malaspina Glacier, Alaska (22800052331).jpg
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[edit]DescriptionMalaspina Glacier, Alaska (22800052331).jpg |
The ice of a piedmont glacier spills from a steep valley onto a relatively flat plain, where it spreads out unconstrained like pancake batter. Elephant Foot Glacier in northeastern Greenland is an excellent example; it is particularly noted for its symmetry. But the largest piedmont glacier in North America (and possibly the world) is Malaspina in southeastern Alaska. On September 24, 2014, the Operational Land Imager (OLI) on Landsat 8 acquired this image of Malaspina Glacier. The main source of ice comes from Seward Glacier, located at the top-center of this image. The Agassiz and Libbey glaciers are visible on the left side, and the Hayden and Marvine glaciers are on the right. The brown lines on the ice are moraines—areas where soil, rock, and other debris have been scraped up by the glacier and deposited at its sides. Where two glaciers flow together, the moraines merge to form a medial moraine. Glaciers that flow at a steady speed tend to have moraines that are relatively straight. But what causes the dizzying pattern of curves, zigzags, and loops of Malaspina’s moraines? Glaciers in this area of Alaska periodically “surge,”meaning they lurch forward quickly for one to several years. As a result of this irregular flow, the moraines at the edges and between glaciers can become folded, compressed, and sheared to form the characteristic loops seen on Malaspina. For instance, a surge in 1986 displaced moraines on the east side of Malaspina by as much as 5 kilometers (3 miles). NASA Earth Observatory image by Jesse Allen, using Landsat data from the U.S. Geological Survey. Caption by Kathryn Hansen. Credit: NASA Earth Observatory NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. Follow us on Twitter Like us on Facebook Find us on Instagram |
Date | Taken on 24 September 2014 |
Source | Malaspina Glacier, Alaska |
Author | NASA Goddard Space Flight Center from Greenbelt, MD, USA |
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This image was originally posted to Flickr by NASA Goddard Photo and Video at https://flickr.com/photos/24662369@N07/22800052331. It was reviewed on 17 September 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
17 September 2016
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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current | 20:02, 17 September 2016 | 6,000 × 6,000 (4.46 MB) | Vanished Account Byeznhpyxeuztibuo (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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- User:Symposiarch/Mainz/2020 November 11-20
- File:Malaspina Glacier landsat.jpg (file redirect)
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Image title | IDL TIFF file |
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Width | 16,201 px |
Height | 16,381 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CC 2014 (Macintosh) |
File change date and time | 16:21, 30 April 2015 |
Color space | sRGB |
Date and time of digitizing | 08:16, 30 April 2015 |
Date metadata was last modified | 12:21, 30 April 2015 |
Unique ID of original document | xmp.did:c5d7eb11-948b-4609-8a56-565147debf6f |
IIM version | 25,856 |
- Agassiz Glacier
- Confluences of glaciers in Alaska
- Glacial flow
- Hayden Glacier (Alaska)
- Libbey Glacier
- Satellite pictures of Malaspina Glacier
- Marvine Glacier
- Moraines in Alaska
- Plains of Alaska
- Rock glaciers of Alaska
- Satellite pictures of Alaska
- September 2014 in Alaska
- Seward Glacier
- Valley glaciers in Alaska in 2014