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Tripati, Aradhna K; Eagle, Robert A; Morton, Andrew C; Dowdeswell, Julian A; Atkinson, Katie L; Bahé, Yannick; Dawber, Caroline F; Khadun, Emma; Shaw, Ruth M H; Shorttle, Oliver; Thanabalasundaram, Lavaniya (2008): Heavy minerals, grain size distribution, and ice-rafted debris in the Greenland Sea during 44 to 30 Ma [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.707156, Supplement to: Tripati, AK et al. (2008): Evidence for glaciation in the Northern Hemisphere back to 44 Ma from ice-rafted debris in the Greenland Sea. Earth and Planetary Science Letters, 265(1-2), 112-122, https://doi.org/10.1016/j.epsl.2007.09.045

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Abstract:
The widely accepted age estimate for the onset of glaciation in the Northern Hemisphere ranges between 2 and 15 million years ago (Ma). However, recent studies indicate the date for glacial onset may be significantly older. We report the presence of ice-rafted debris (IRD) in ~44 to 30 Ma sediments from the Greenland Sea, evidence for glaciation in the North Atlantic during the Middle Eocene to Early Oligocene. Detailed sedimentological evidence indicates that glaciers extended to sea level in the region, allowing icebergs to be produced. IRD may have been sourced from tidewater glaciers, small ice caps, and/or a continental ice sheet.
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:
2 datasets

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Datasets listed in this publication series

  1. Tripati, AK; Eagle, RA; Morton, AC et al. (2008): (Appendix A) Grain size distribution of ODP Hole 151-913B. https://doi.org/10.1594/PANGAEA.707154
  2. Tripati, AK; Eagle, RA; Morton, AC et al. (2008): (Table 1) Heavy mineral analysis of ODP Hole 151-913B. https://doi.org/10.1594/PANGAEA.707150