Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B
The Eocene and Oligocene epochs (55 to 23 million years ago) comprise a critical phase in Earth history. An array of geological records (Zachos et al., 2001, doi:10.1126/science.1059412; Lear et al., 2000, doi:10.1126/science.287.5451.269; Coxall et al., 2005, doi:10.1038/nature03135; Pekar et al.,...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.769772 2024-09-15T17:46:20+00:00 Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B Eldrett, James S Harding, Ian C Wilson, Paul A Butler, Emily Roberts, Andrew P LATITUDE: 75.489200 * LONGITUDE: 6.946800 * DATE/TIME START: 1993-09-16T12:17:00 * DATE/TIME END: 1993-09-20T20:30:00 2007 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.769772 https://doi.org/10.1594/PANGAEA.769772 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.769772 https://doi.org/10.1594/PANGAEA.769772 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Eldrett, James S; Harding, Ian C; Wilson, Paul A; Butler, Emily; Roberts, Andrew P (2007): Continental ice in Greenland during the Eocene and Oligocene. Nature, 446(7132), 176-179, https://doi.org/10.1038/nature05591 151-913B DRILL Drilling/drill rig Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP dataset publication series 2007 ftpangaea https://doi.org/10.1594/PANGAEA.76977210.1038/nature05591 2024-07-24T02:31:21Z The Eocene and Oligocene epochs (55 to 23 million years ago) comprise a critical phase in Earth history. An array of geological records (Zachos et al., 2001, doi:10.1126/science.1059412; Lear et al., 2000, doi:10.1126/science.287.5451.269; Coxall et al., 2005, doi:10.1038/nature03135; Pekar et al., 2005; doi:10.1130/B25486.1; Strand et al., 2003, doi:10.1016/S0031-0182(03)00396-1) supported by climate modelling (DeConto and Pollard, 2003, doi:10.1038/nature01290) indicates a profound shift in global climate during this interval, from a state that was largely free of polar ice caps to one in which ice sheets on Antarctica approached their modern size. However, the early glaciation history of the Northern Hemisphere is a subject of controversy (Coxall et al., 2005, doi:10.1038/nature03135; Tripati et al., 2005, doi:10.1038/nature03874; Wolf-Welling et al., 1996, doi:10.2973/odp.proc.sr.151.139.1996; Moran et al., 2006, doi:10.1038/nature04800). Here we report stratigraphically extensive ice-rafted debris, including macroscopic dropstones, in late Eocene to early Oligocene sediments from the Norwegian-Greenland Sea that were deposited between about 38 and 30 million years ago. Our data indicate sediment rafting by glacial ice, rather than sea ice, and point to East Greenland as the likely source. Records of this type from one site alone cannot be used to determine the extent of ice involved. However, our data suggest the existence of (at least) isolated glaciers on Greenland about 20 million years earlier than previously documented (Winkler et al., 2002, doi:10.1007/s005310100199), at a time when temperatures and atmospheric carbon dioxide concentrations were substantially higher. Other/Unknown Material Antarc* Antarctica East Greenland Greenland Greenland Sea North Greenland Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(6.946800,6.946800,75.489200,75.489200) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
151-913B DRILL Drilling/drill rig Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP |
spellingShingle |
151-913B DRILL Drilling/drill rig Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP Eldrett, James S Harding, Ian C Wilson, Paul A Butler, Emily Roberts, Andrew P Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B |
topic_facet |
151-913B DRILL Drilling/drill rig Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP |
description |
The Eocene and Oligocene epochs (55 to 23 million years ago) comprise a critical phase in Earth history. An array of geological records (Zachos et al., 2001, doi:10.1126/science.1059412; Lear et al., 2000, doi:10.1126/science.287.5451.269; Coxall et al., 2005, doi:10.1038/nature03135; Pekar et al., 2005; doi:10.1130/B25486.1; Strand et al., 2003, doi:10.1016/S0031-0182(03)00396-1) supported by climate modelling (DeConto and Pollard, 2003, doi:10.1038/nature01290) indicates a profound shift in global climate during this interval, from a state that was largely free of polar ice caps to one in which ice sheets on Antarctica approached their modern size. However, the early glaciation history of the Northern Hemisphere is a subject of controversy (Coxall et al., 2005, doi:10.1038/nature03135; Tripati et al., 2005, doi:10.1038/nature03874; Wolf-Welling et al., 1996, doi:10.2973/odp.proc.sr.151.139.1996; Moran et al., 2006, doi:10.1038/nature04800). Here we report stratigraphically extensive ice-rafted debris, including macroscopic dropstones, in late Eocene to early Oligocene sediments from the Norwegian-Greenland Sea that were deposited between about 38 and 30 million years ago. Our data indicate sediment rafting by glacial ice, rather than sea ice, and point to East Greenland as the likely source. Records of this type from one site alone cannot be used to determine the extent of ice involved. However, our data suggest the existence of (at least) isolated glaciers on Greenland about 20 million years earlier than previously documented (Winkler et al., 2002, doi:10.1007/s005310100199), at a time when temperatures and atmospheric carbon dioxide concentrations were substantially higher. |
format |
Other/Unknown Material |
author |
Eldrett, James S Harding, Ian C Wilson, Paul A Butler, Emily Roberts, Andrew P |
author_facet |
Eldrett, James S Harding, Ian C Wilson, Paul A Butler, Emily Roberts, Andrew P |
author_sort |
Eldrett, James S |
title |
Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B |
title_short |
Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B |
title_full |
Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B |
title_fullStr |
Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B |
title_full_unstemmed |
Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B |
title_sort |
sedimentology, geochemistry and paleomagnetic of odp hole 151-913b |
publisher |
PANGAEA |
publishDate |
2007 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.769772 https://doi.org/10.1594/PANGAEA.769772 |
op_coverage |
LATITUDE: 75.489200 * LONGITUDE: 6.946800 * DATE/TIME START: 1993-09-16T12:17:00 * DATE/TIME END: 1993-09-20T20:30:00 |
long_lat |
ENVELOPE(6.946800,6.946800,75.489200,75.489200) |
genre |
Antarc* Antarctica East Greenland Greenland Greenland Sea North Greenland Sea ice |
genre_facet |
Antarc* Antarctica East Greenland Greenland Greenland Sea North Greenland Sea ice |
op_source |
Supplement to: Eldrett, James S; Harding, Ian C; Wilson, Paul A; Butler, Emily; Roberts, Andrew P (2007): Continental ice in Greenland during the Eocene and Oligocene. Nature, 446(7132), 176-179, https://doi.org/10.1038/nature05591 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.769772 https://doi.org/10.1594/PANGAEA.769772 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.76977210.1038/nature05591 |
_version_ |
1810494386420580352 |