Erosion of the Laurentide Region of North America by Glacial and Glaciofluvial Processes
Collection of seismic reflection data from continental margins and ocean basins surrounding North America makes it possible to estimate the amount of material eroded from the area formerly covered by Laurentide ice sheets since major glaciation began in North America. A minimum estimate is made of 1...
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Cambridge University Press (CUP)
1985
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Online Access: | http://dx.doi.org/10.1016/0033-5894(85)90026-2 http://api.elsevier.com/content/article/PII:0033589485900262?httpAccept=text/xml http://api.elsevier.com/content/article/PII:0033589485900262?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400017245 |
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crcambridgeupr:10.1016/0033-5894(85)90026-2 2024-09-15T17:41:50+00:00 Erosion of the Laurentide Region of North America by Glacial and Glaciofluvial Processes Bell, M. Laine, E. P. 1985 http://dx.doi.org/10.1016/0033-5894(85)90026-2 http://api.elsevier.com/content/article/PII:0033589485900262?httpAccept=text/xml http://api.elsevier.com/content/article/PII:0033589485900262?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400017245 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 23, issue 2, page 154-174 ISSN 0033-5894 1096-0287 journal-article 1985 crcambridgeupr https://doi.org/10.1016/0033-5894(85)90026-2 2024-08-07T04:04:12Z Collection of seismic reflection data from continental margins and ocean basins surrounding North America makes it possible to estimate the amount of material eroded from the area formerly covered by Laurentide ice sheets since major glaciation began in North America. A minimum estimate is made of 1.62 × 10 6 km 3 , or an average 120 m of rock physically eroded from the Laurentide region. This figure is an order of magnitude higher than earlier estimates based on the volume of glacial drift, Cenozoic marine sediments, and modern sediment loads of rivers. Most of the sediment produced during Laurentide glaciation has already been transported to the oceans. The importance of continental glaciation as a geomorphic agency in North America may have to be reevaluated. Evidence from sedimentation rates in ocean basins surrounding Greenland and Antarctica suggests that sediment production, sediment transport, and possibly denudation by permanent ice caps may be substantially lower than by periodic ice caps, such as the Laurentide. Low rates of sediment survival from the time of the Permo-Carboniferous and Precambrian glaciations suggest that predominance of marine deposition during some glacial epochs results in shorter lived sediment because of preferential tectonism and cycling of oceanic crust versus continental crust. Article in Journal/Newspaper Antarc* Antarctica Greenland Cambridge University Press Quaternary Research 23 2 154 174 |
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Open Polar |
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Cambridge University Press |
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language |
English |
description |
Collection of seismic reflection data from continental margins and ocean basins surrounding North America makes it possible to estimate the amount of material eroded from the area formerly covered by Laurentide ice sheets since major glaciation began in North America. A minimum estimate is made of 1.62 × 10 6 km 3 , or an average 120 m of rock physically eroded from the Laurentide region. This figure is an order of magnitude higher than earlier estimates based on the volume of glacial drift, Cenozoic marine sediments, and modern sediment loads of rivers. Most of the sediment produced during Laurentide glaciation has already been transported to the oceans. The importance of continental glaciation as a geomorphic agency in North America may have to be reevaluated. Evidence from sedimentation rates in ocean basins surrounding Greenland and Antarctica suggests that sediment production, sediment transport, and possibly denudation by permanent ice caps may be substantially lower than by periodic ice caps, such as the Laurentide. Low rates of sediment survival from the time of the Permo-Carboniferous and Precambrian glaciations suggest that predominance of marine deposition during some glacial epochs results in shorter lived sediment because of preferential tectonism and cycling of oceanic crust versus continental crust. |
format |
Article in Journal/Newspaper |
author |
Bell, M. Laine, E. P. |
spellingShingle |
Bell, M. Laine, E. P. Erosion of the Laurentide Region of North America by Glacial and Glaciofluvial Processes |
author_facet |
Bell, M. Laine, E. P. |
author_sort |
Bell, M. |
title |
Erosion of the Laurentide Region of North America by Glacial and Glaciofluvial Processes |
title_short |
Erosion of the Laurentide Region of North America by Glacial and Glaciofluvial Processes |
title_full |
Erosion of the Laurentide Region of North America by Glacial and Glaciofluvial Processes |
title_fullStr |
Erosion of the Laurentide Region of North America by Glacial and Glaciofluvial Processes |
title_full_unstemmed |
Erosion of the Laurentide Region of North America by Glacial and Glaciofluvial Processes |
title_sort |
erosion of the laurentide region of north america by glacial and glaciofluvial processes |
publisher |
Cambridge University Press (CUP) |
publishDate |
1985 |
url |
http://dx.doi.org/10.1016/0033-5894(85)90026-2 http://api.elsevier.com/content/article/PII:0033589485900262?httpAccept=text/xml http://api.elsevier.com/content/article/PII:0033589485900262?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400017245 |
genre |
Antarc* Antarctica Greenland |
genre_facet |
Antarc* Antarctica Greenland |
op_source |
Quaternary Research volume 23, issue 2, page 154-174 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/0033-5894(85)90026-2 |
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Quaternary Research |
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23 |
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2 |
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154 |
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1810488104732065792 |