Beryllium‐10 surface exposure dating of glacial successions in the Central Alaska Range
Abstract Glacial landforms and outwash terraces in the Nenana River valley, Reindeer Hills and Monahan Flat in the central Alaska Range were dated with 60 10 Be exposure ages to determine the timing of Late Pleistocene glaciation. In the Nenana River valley, glaciation occurred at 104–180 ka (Lignit...
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crwiley:10.1002/jqs.1406 2024-06-23T07:45:03+00:00 Beryllium‐10 surface exposure dating of glacial successions in the Central Alaska Range Dortch, Jason M. Owen, Lewis A. Caffee, Marc W. Li, Dewen Lowell, Thomas V. 2010 http://dx.doi.org/10.1002/jqs.1406 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1406 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1406 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 25, issue 8, page 1259-1269 ISSN 0267-8179 1099-1417 journal-article 2010 crwiley https://doi.org/10.1002/jqs.1406 2024-06-06T04:24:38Z Abstract Glacial landforms and outwash terraces in the Nenana River valley, Reindeer Hills and Monahan Flat in the central Alaska Range were dated with 60 10 Be exposure ages to determine the timing of Late Pleistocene glaciation. In the Nenana River valley, glaciation occurred at 104–180 ka (Lignite Creek glaciation), ca. 55 ka (Healy glaciation), and ca. 16 ka (Carlo Creek phase); glaciers retreated in the Reindeer Hills and Monahan Flat by ca. 14 ka and ca. 13 ka, respectively. The Carlo Creek moraine is similar in age to at least six other moraines in the Alaska Range, Ahklun Mountains and Brooks Range. The new data suggest that post‐depositional geological processes limit the usefulness of 10 Be methods to the latter part (≤60 ka) of the late Quaternary in central Alaska. Ages on Healy and younger landforms cluster well, with the exception of Riley Creek moraines and Monahan Flat‐west sites, where boulders were likely affected by post‐depositional processes. Copyright © 2010 John Wiley & Sons, Ltd. Article in Journal/Newspaper alaska range Brooks Range glaciers Alaska Wiley Online Library Riley ENVELOPE(-147.617,-147.617,-86.183,-86.183) Journal of Quaternary Science 25 8 1259 1269 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Glacial landforms and outwash terraces in the Nenana River valley, Reindeer Hills and Monahan Flat in the central Alaska Range were dated with 60 10 Be exposure ages to determine the timing of Late Pleistocene glaciation. In the Nenana River valley, glaciation occurred at 104–180 ka (Lignite Creek glaciation), ca. 55 ka (Healy glaciation), and ca. 16 ka (Carlo Creek phase); glaciers retreated in the Reindeer Hills and Monahan Flat by ca. 14 ka and ca. 13 ka, respectively. The Carlo Creek moraine is similar in age to at least six other moraines in the Alaska Range, Ahklun Mountains and Brooks Range. The new data suggest that post‐depositional geological processes limit the usefulness of 10 Be methods to the latter part (≤60 ka) of the late Quaternary in central Alaska. Ages on Healy and younger landforms cluster well, with the exception of Riley Creek moraines and Monahan Flat‐west sites, where boulders were likely affected by post‐depositional processes. Copyright © 2010 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Dortch, Jason M. Owen, Lewis A. Caffee, Marc W. Li, Dewen Lowell, Thomas V. |
spellingShingle |
Dortch, Jason M. Owen, Lewis A. Caffee, Marc W. Li, Dewen Lowell, Thomas V. Beryllium‐10 surface exposure dating of glacial successions in the Central Alaska Range |
author_facet |
Dortch, Jason M. Owen, Lewis A. Caffee, Marc W. Li, Dewen Lowell, Thomas V. |
author_sort |
Dortch, Jason M. |
title |
Beryllium‐10 surface exposure dating of glacial successions in the Central Alaska Range |
title_short |
Beryllium‐10 surface exposure dating of glacial successions in the Central Alaska Range |
title_full |
Beryllium‐10 surface exposure dating of glacial successions in the Central Alaska Range |
title_fullStr |
Beryllium‐10 surface exposure dating of glacial successions in the Central Alaska Range |
title_full_unstemmed |
Beryllium‐10 surface exposure dating of glacial successions in the Central Alaska Range |
title_sort |
beryllium‐10 surface exposure dating of glacial successions in the central alaska range |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1002/jqs.1406 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1406 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1406 |
long_lat |
ENVELOPE(-147.617,-147.617,-86.183,-86.183) |
geographic |
Riley |
geographic_facet |
Riley |
genre |
alaska range Brooks Range glaciers Alaska |
genre_facet |
alaska range Brooks Range glaciers Alaska |
op_source |
Journal of Quaternary Science volume 25, issue 8, page 1259-1269 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1406 |
container_title |
Journal of Quaternary Science |
container_volume |
25 |
container_issue |
8 |
container_start_page |
1259 |
op_container_end_page |
1269 |
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1802650108440870912 |