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Eldrett, James S; Harding, Ian C; Wilson, Paul A; Butler, Emily; Roberts, Andrew P (2007): Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.769772, Supplement to: Eldrett, JS et al. (2007): Continental ice in Greenland during the Eocene and Oligocene. Nature, 446(7132), 176-179, https://doi.org/10.1038/nature05591

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Abstract:
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.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 75.489200 * Longitude: 6.946800
Date/Time Start: 1993-09-16T12:17:00 * Date/Time End: 1993-09-20T20:30:00
Event(s):
151-913B * Latitude: 75.489200 * Longitude: 6.946800 * Date/Time Start: 1993-09-16T12:17:00 * Date/Time End: 1993-09-20T20:30:00 * Elevation: -3330.0 m * Penetration: 770.3 m * Recovery: 210.29 m * Location: North Greenland Sea * Campaign: Leg151 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 51 core; 491.3 m cored; 0 m drilled; 42.8 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Eldrett, JS; Harding, IC; Wilson, PA et al. (2007): Geochemistry of Eocene and Oligocene sediments of ODP Hole 151-913B. https://doi.org/10.1594/PANGAEA.769771
  2. Eldrett, JS; Harding, IC; Wilson, PA et al. (2007): Grain size distribution and accumulation rates of sand of ODP Hole 151-913B. https://doi.org/10.1594/PANGAEA.769752
  3. Eldrett, JS; Harding, IC; Wilson, PA et al. (2007): Paleomagnetic of the Eocene and Oligocene section of ODP Hole 151-913B. https://doi.org/10.1594/PANGAEA.769770