Characteristics and Origins of the Debris and Ice, Matanuska Glacier, Alaska
Abstract The physical characteristics of the ice and debris of the Matanuska Glacier, Alaska (lat. 61 ° 47 ’ , long. 147 ° 45 ’ ) and their consistent variation in a vertical stratigraphic column of the glacier indicate multiple origins for both. The two zones of ice recognized in the glacier are th...
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Language: | English |
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Cambridge University Press (CUP)
1979
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Online Access: | http://dx.doi.org/10.1017/s0022143000030252 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000030252 |
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crcambridgeupr:10.1017/s0022143000030252 2024-04-07T07:52:35+00:00 Characteristics and Origins of the Debris and Ice, Matanuska Glacier, Alaska Lawson, D.E. 1979 http://dx.doi.org/10.1017/s0022143000030252 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000030252 en eng Cambridge University Press (CUP) Journal of Glaciology volume 23, issue 89, page 437-438 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1979 crcambridgeupr https://doi.org/10.1017/s0022143000030252 2024-03-08T00:30:18Z Abstract The physical characteristics of the ice and debris of the Matanuska Glacier, Alaska (lat. 61 ° 47 ’ , long. 147 ° 45 ’ ) and their consistent variation in a vertical stratigraphic column of the glacier indicate multiple origins for both. The two zones of ice recognized in the glacier are the upper englacial zone, which comprises the bulk of the glacier (est. 300 m thick), and the thin (3 to 15 m thick) basal zone, which contains an estimated 97% of the sediment transported in the glacier. The physical characteristics of the ice and the quantity and mode of distribution of debris in it define two ice facies in each zone. The englacial zone consists mainly of the debris-poor (0.002 volume per cent) diffused facies. White coarse-bubbly ice and blue coarse-clear ice (2 to 10 cm diameter) comprise most of this facies. The bubble-rich banded facies (debris bands) contains abundant debris (25 to 50 volume per cent), varies in lateral and vertical extent, and occurs randomly in the diffused facies. Article in Journal/Newspaper glacier Journal of Glaciology Alaska Cambridge University Press Journal of Glaciology 23 89 437 438 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Lawson, D.E. Characteristics and Origins of the Debris and Ice, Matanuska Glacier, Alaska |
topic_facet |
Earth-Surface Processes |
description |
Abstract The physical characteristics of the ice and debris of the Matanuska Glacier, Alaska (lat. 61 ° 47 ’ , long. 147 ° 45 ’ ) and their consistent variation in a vertical stratigraphic column of the glacier indicate multiple origins for both. The two zones of ice recognized in the glacier are the upper englacial zone, which comprises the bulk of the glacier (est. 300 m thick), and the thin (3 to 15 m thick) basal zone, which contains an estimated 97% of the sediment transported in the glacier. The physical characteristics of the ice and the quantity and mode of distribution of debris in it define two ice facies in each zone. The englacial zone consists mainly of the debris-poor (0.002 volume per cent) diffused facies. White coarse-bubbly ice and blue coarse-clear ice (2 to 10 cm diameter) comprise most of this facies. The bubble-rich banded facies (debris bands) contains abundant debris (25 to 50 volume per cent), varies in lateral and vertical extent, and occurs randomly in the diffused facies. |
format |
Article in Journal/Newspaper |
author |
Lawson, D.E. |
author_facet |
Lawson, D.E. |
author_sort |
Lawson, D.E. |
title |
Characteristics and Origins of the Debris and Ice, Matanuska Glacier, Alaska |
title_short |
Characteristics and Origins of the Debris and Ice, Matanuska Glacier, Alaska |
title_full |
Characteristics and Origins of the Debris and Ice, Matanuska Glacier, Alaska |
title_fullStr |
Characteristics and Origins of the Debris and Ice, Matanuska Glacier, Alaska |
title_full_unstemmed |
Characteristics and Origins of the Debris and Ice, Matanuska Glacier, Alaska |
title_sort |
characteristics and origins of the debris and ice, matanuska glacier, alaska |
publisher |
Cambridge University Press (CUP) |
publishDate |
1979 |
url |
http://dx.doi.org/10.1017/s0022143000030252 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000030252 |
genre |
glacier Journal of Glaciology Alaska |
genre_facet |
glacier Journal of Glaciology Alaska |
op_source |
Journal of Glaciology volume 23, issue 89, page 437-438 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000030252 |
container_title |
Journal of Glaciology |
container_volume |
23 |
container_issue |
89 |
container_start_page |
437 |
op_container_end_page |
438 |
_version_ |
1795667992426577920 |