Evidence for glaciation in the Northern Hemisphere back to 44 Ma from ice-rafted debris in the Greenland Sea

Tripati, A. K. and Eagle, R. A. and Morton, A. and Dowdeswell, J. A. and Atkinson, K. L. and Bahe, Y. and Dawber, C. F. and Khadun, E. and Shaw, R. M. H. and Shorttle, O. and Thanabalasundaram, L. (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). pp. 112-122. DOI 10.1016/j.epsl.2007.09.045

[img] PDF
Tripati_et_al_EPSL_265_2008.pdf
Restricted to Registered users only

Download (1MB)
Official URL: http://dx.doi.org/10.1016/j.epsl.2007.09.045

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.

Item Type: Article
Uncontrolled Keywords: 2007 AREP IA55 2008 P, Part 1
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: Earth and Planetary Science Letters
Volume: 265
Page Range: pp. 112-122
Identification Number: 10.1016/j.epsl.2007.09.045
Depositing User: Sarah Humbert
Date Deposited: 16 Feb 2009 13:04
Last Modified: 23 Jul 2013 10:08
URI: http://eprints.esc.cam.ac.uk/id/eprint/753

Actions (login required)

View Item View Item

About cookies