Microfossil Evidence for Recent and Past Changes to Hudson Bay Oceanography
In 2005, box cores were collected throughout the Hudson Bay and Strait. A detailed micropaleontological data set has been generated from these cores for this study and is combined with geochemical and geochronological data to observe temporal and spatial oceanographic changes throughout the bay and...
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ftcanadathes:oai:collectionscanada.gc.ca:NSHD.ca#10222/13136 2023-05-15T16:35:13+02:00 Microfossil Evidence for Recent and Past Changes to Hudson Bay Oceanography Griffiths, Julie 2010-12-15T13:32:05Z http://hdl.handle.net/10222/13136 en eng http://hdl.handle.net/10222/13136 Paleoceanography Marine Sediment Cores Hudson Bay and Strait Benthonic Foraminifera Tintinnids Sea Ice 2010 ftcanadathes 2013-11-23T23:00:20Z In 2005, box cores were collected throughout the Hudson Bay and Strait. A detailed micropaleontological data set has been generated from these cores for this study and is combined with geochemical and geochronological data to observe temporal and spatial oceanographic changes throughout the bay and strait. All of the cores show an increase in tintinnid species and agglutinated foraminifera, and coincident decreases in calcareous foraminifera in younger core sections. In general, these microfossil trends are correlated with higher organic matter content of the younger core sections. This results from a more extensive freshwater plume that causes lowered pH in the superficial sediments and conditions less favourable for the preservation of calcareous tests. Furthermore, with a 14C age constraint in one of the cores, the mid-Holocene depositional and paleoceanographic history is represented, and provides evidence of marine invasion by 7100 cal yrs BP. Other/Unknown Material Hudson Bay Sea ice Theses Canada/Thèses Canada (Library and Archives Canada) Hudson Hudson Bay |
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Theses Canada/Thèses Canada (Library and Archives Canada) |
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ftcanadathes |
language |
English |
topic |
Paleoceanography Marine Sediment Cores Hudson Bay and Strait Benthonic Foraminifera Tintinnids Sea Ice |
spellingShingle |
Paleoceanography Marine Sediment Cores Hudson Bay and Strait Benthonic Foraminifera Tintinnids Sea Ice Griffiths, Julie Microfossil Evidence for Recent and Past Changes to Hudson Bay Oceanography |
topic_facet |
Paleoceanography Marine Sediment Cores Hudson Bay and Strait Benthonic Foraminifera Tintinnids Sea Ice |
description |
In 2005, box cores were collected throughout the Hudson Bay and Strait. A detailed micropaleontological data set has been generated from these cores for this study and is combined with geochemical and geochronological data to observe temporal and spatial oceanographic changes throughout the bay and strait. All of the cores show an increase in tintinnid species and agglutinated foraminifera, and coincident decreases in calcareous foraminifera in younger core sections. In general, these microfossil trends are correlated with higher organic matter content of the younger core sections. This results from a more extensive freshwater plume that causes lowered pH in the superficial sediments and conditions less favourable for the preservation of calcareous tests. Furthermore, with a 14C age constraint in one of the cores, the mid-Holocene depositional and paleoceanographic history is represented, and provides evidence of marine invasion by 7100 cal yrs BP. |
author |
Griffiths, Julie |
author_facet |
Griffiths, Julie |
author_sort |
Griffiths, Julie |
title |
Microfossil Evidence for Recent and Past Changes to Hudson Bay Oceanography |
title_short |
Microfossil Evidence for Recent and Past Changes to Hudson Bay Oceanography |
title_full |
Microfossil Evidence for Recent and Past Changes to Hudson Bay Oceanography |
title_fullStr |
Microfossil Evidence for Recent and Past Changes to Hudson Bay Oceanography |
title_full_unstemmed |
Microfossil Evidence for Recent and Past Changes to Hudson Bay Oceanography |
title_sort |
microfossil evidence for recent and past changes to hudson bay oceanography |
publishDate |
2010 |
url |
http://hdl.handle.net/10222/13136 |
geographic |
Hudson Hudson Bay |
geographic_facet |
Hudson Hudson Bay |
genre |
Hudson Bay Sea ice |
genre_facet |
Hudson Bay Sea ice |
op_relation |
http://hdl.handle.net/10222/13136 |
_version_ |
1766025398423912448 |