Pliocene-Pleistocene ice rafting history and cyclicity in the Nordic seas during the last 3.5 Myr

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doi: 10.1029/1999PA000435
Author(s): Jensen, Eystein; Fronval, Torben; Rack, Frank; Channell, James E. T.
Author Affiliation(s): Primary:
University of Bergen, Department of Geology, Bergen, Norway
University of Copenhagen, Denmark
University of New Brunswick, Canada
University of Florida, United States
Volume Title: Paleoceanography
Source: Paleoceanography, 15(6), p.709-721. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0883-8305 CODEN: POCGEP
Note: In English. 55 refs.; illus., incl. sketch map
Summary: A continuous 3.5 Myr IRD record was produced from Ocean Drilling Program (ODP) Site 907. A timescale based on magnetic polarity chrons, oxygen isotope stratigraphy (for the last 1Myr) and orbital tuning was developed. The record documents a stepwise inception of large-scale glacial cycles in the Nordic Seas region, the first being a marked expansion of the Greenland ice sheet at 3.3 Ma. A second step occurred at 2.74 Ma by an expansion of large scale ice sheets in the Northern Hemisphere. Ice sheet variability around the Nordic Seas was tightly coupled to global ice volume over the past 3.3 Myr. Between 3 and 1 Ma, most of the variance of the IRD signal is in the 41 kyr band, whereas the last 1 Myr is characterized by stronger 100 kyr variance. The Gamma Ray Porosity Evaluator (GRAPE) density record is closely linked with IRD variations and documents sub orbital variability resembling the late Quaternary Heinrich/Bond cycles. Copyright 2000 by the American Geophysical Union.
Year of Publication: 2000
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Arctic Ocean; Arctic region; Atlantic Ocean; Cenozoic; Climate change; DSDP Site 610; Deep Sea Drilling Project; Glacial geology; Glaciers; IPOD; Ice rafting; Ice sheets; Leg 104; Leg 151; Leg 162; Leg 94; Neogene; North Atlantic; ODP Site 642; ODP Site 644; ODP Site 907; ODP Site 983; ODP Site 987; Ocean Drilling Program; Paleoclimatology; Pleistocene; Pliocene; Quaternary; Tertiary
Coordinates: N531318 N531329 W0185312 W0185342
N691455 N802830 E0081340 W0124155
N671312 N671330 E0025548 E0025542
N664042 N664042 E0043436 E0043436
N691459 N691459 W0124154 W0124154
N602412 N602412 W0233826 W0233826
N702948 N702948 W0175614 W0175614
Record ID: 2001080305
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.