10 Be ages of flood deposits west of Lake Nipigon, Ontario: evidence for eastward meltwater drainage during the early Holocene Epoch
The Nipigon channels, located to the west and northwest of Lake Nipigon, Ontario, are thought to have enabled the eastward drainage of meltwater from glacial Lake Agassiz during the last deglaciation. Here we present the first direct ages of flood deposits in two of these channels using 10 Be surfac...
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crcansciencepubl:10.1139/cjes-2015-0135 2024-04-07T07:53:17+00:00 10 Be ages of flood deposits west of Lake Nipigon, Ontario: evidence for eastward meltwater drainage during the early Holocene Epoch Kelly, Meredith A. Fisher, Timothy G. Lowell, Thomas V. Barnett, Peter J. Schwartz, Roseanne Gajewski, Konrad 2016 http://dx.doi.org/10.1139/cjes-2015-0135 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2015-0135 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2015-0135 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 53, issue 3, page 321-330 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2016 crcansciencepubl https://doi.org/10.1139/cjes-2015-0135 2024-03-08T00:37:42Z The Nipigon channels, located to the west and northwest of Lake Nipigon, Ontario, are thought to have enabled the eastward drainage of meltwater from glacial Lake Agassiz during the last deglaciation. Here we present the first direct ages of flood deposits in two of these channels using 10 Be surface exposure dating. Five 10 Be ages of a coarse-grained deposit near the Roaring River in the Kaiashk channel complex indicate deglaciation and cessation of water flow by ∼11 070 ± 430 years. To test for inherited nuclides in boulder samples, we also measured the 10 Be concentrations of the undersides of two boulders at the Roaring River site. Five 10 Be ages of boulders atop a large bedform near Mundell Lake in the Pillar channel complex indicate deglaciation and cessation of water flow by ∼10 770 ± 240 years. Two 10 Be ages of nearby bedrock are slightly younger (10 340 ± 260 and 9860 ± 270 years). The 10 Be ages from the two sites are statistically indistinguishable and indicate that Laurentide Ice Sheet recession occurred rapidly in the region. We used clast diameters and channel dimensions at the Mundell Lake site to estimate paleodischarge and evaluate the possibility that meltwater drainage influenced climate conditions. We estimate a large maximum discharge of 119 000–159 000 m 3 ·s −1 at the site. However, the timing of meltwater discharge at both Roaring River and Mundell Lake is not contemporaneous with abrupt climate events. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Pillar ENVELOPE(166.217,166.217,-77.583,-77.583) The Pillar ENVELOPE(-126.853,-126.853,57.300,57.300) Mundell Lake ENVELOPE(-98.125,-98.125,57.801,57.801) Canadian Journal of Earth Sciences 53 3 321 330 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Kelly, Meredith A. Fisher, Timothy G. Lowell, Thomas V. Barnett, Peter J. Schwartz, Roseanne 10 Be ages of flood deposits west of Lake Nipigon, Ontario: evidence for eastward meltwater drainage during the early Holocene Epoch |
topic_facet |
General Earth and Planetary Sciences |
description |
The Nipigon channels, located to the west and northwest of Lake Nipigon, Ontario, are thought to have enabled the eastward drainage of meltwater from glacial Lake Agassiz during the last deglaciation. Here we present the first direct ages of flood deposits in two of these channels using 10 Be surface exposure dating. Five 10 Be ages of a coarse-grained deposit near the Roaring River in the Kaiashk channel complex indicate deglaciation and cessation of water flow by ∼11 070 ± 430 years. To test for inherited nuclides in boulder samples, we also measured the 10 Be concentrations of the undersides of two boulders at the Roaring River site. Five 10 Be ages of boulders atop a large bedform near Mundell Lake in the Pillar channel complex indicate deglaciation and cessation of water flow by ∼10 770 ± 240 years. Two 10 Be ages of nearby bedrock are slightly younger (10 340 ± 260 and 9860 ± 270 years). The 10 Be ages from the two sites are statistically indistinguishable and indicate that Laurentide Ice Sheet recession occurred rapidly in the region. We used clast diameters and channel dimensions at the Mundell Lake site to estimate paleodischarge and evaluate the possibility that meltwater drainage influenced climate conditions. We estimate a large maximum discharge of 119 000–159 000 m 3 ·s −1 at the site. However, the timing of meltwater discharge at both Roaring River and Mundell Lake is not contemporaneous with abrupt climate events. |
author2 |
Gajewski, Konrad |
format |
Article in Journal/Newspaper |
author |
Kelly, Meredith A. Fisher, Timothy G. Lowell, Thomas V. Barnett, Peter J. Schwartz, Roseanne |
author_facet |
Kelly, Meredith A. Fisher, Timothy G. Lowell, Thomas V. Barnett, Peter J. Schwartz, Roseanne |
author_sort |
Kelly, Meredith A. |
title |
10 Be ages of flood deposits west of Lake Nipigon, Ontario: evidence for eastward meltwater drainage during the early Holocene Epoch |
title_short |
10 Be ages of flood deposits west of Lake Nipigon, Ontario: evidence for eastward meltwater drainage during the early Holocene Epoch |
title_full |
10 Be ages of flood deposits west of Lake Nipigon, Ontario: evidence for eastward meltwater drainage during the early Holocene Epoch |
title_fullStr |
10 Be ages of flood deposits west of Lake Nipigon, Ontario: evidence for eastward meltwater drainage during the early Holocene Epoch |
title_full_unstemmed |
10 Be ages of flood deposits west of Lake Nipigon, Ontario: evidence for eastward meltwater drainage during the early Holocene Epoch |
title_sort |
10 be ages of flood deposits west of lake nipigon, ontario: evidence for eastward meltwater drainage during the early holocene epoch |
publisher |
Canadian Science Publishing |
publishDate |
2016 |
url |
http://dx.doi.org/10.1139/cjes-2015-0135 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2015-0135 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2015-0135 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(166.217,166.217,-77.583,-77.583) ENVELOPE(-126.853,-126.853,57.300,57.300) ENVELOPE(-98.125,-98.125,57.801,57.801) |
geographic |
Glacial Lake Pillar The Pillar Mundell Lake |
geographic_facet |
Glacial Lake Pillar The Pillar Mundell Lake |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Earth Sciences volume 53, issue 3, page 321-330 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjes-2015-0135 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
53 |
container_issue |
3 |
container_start_page |
321 |
op_container_end_page |
330 |
_version_ |
1795668964582359040 |