10.1594/PANGAEA.727068
Andrews, John T
John T
Andrews
0000-0003-3169-5979
Evans, L W
L W
Evans
Williams, Kerstin M
Kerstin M
Williams
Briggs, W M
W M
Briggs
Jull, A J Timothy
A J Timothy
Jull
0000-0002-4079-4947
Erlenkeuser, Helmut
Helmut
Erlenkeuser
0000-0002-5567-4796
Hardy, Iris A
Iris A
Hardy
Age determinations of sediment cores from the Baffin Shelf
PANGAEA
1990
Piston corer
en
Supplementary Publication Series of Datasets
10.1029/PA005i006p00921
3 datasets
application/zip
Creative Commons Attribution 3.0 Unported
Cores HU82-034-057 and HU84-035-008, Resolution Basin, SE Baffin Shelf, contain 200 and 450 cm, respectively, of sediment that spans the Younger Dryas chron. In both cores the interval is bracketed by 14C dates on foraminifera or molluscs. These sites were close to the margin of the late Wisconsin (Foxe) ice sheet as it flowed toward the Labrador Sea. Prior to 11 ka, both cores record moderate to high accumulations of foraminifera, relatively high del 18O values in planktonic foraminifera, and low values of detrital carbonate. The diatom and percent opal records imply occasional seasonally open water conditions. During part of the Younger Dryas chron both the diatom and opal analyses imply a shutoff of biogenic silica production, suggesting surface water conditions affected by increased sea ice and/or reduced nutrients. In addition, the Younger Dryas interval is marked by an increase in coarse sand and detrital carbonate, a decrease in total organic carbon and foraminifera, and high rates of sediment accumulation. The inferred environment during the Younger Dryas is ice-proximal. In HU82-034-057, the foraminifera and other data suggest a change in conditions during the middle part of the Younger Dryas chron.
Supplement to: Andrews, John T; Evans, L W; Williams, Kerstin M; Briggs, W M; Jull, A J Timothy; Erlenkeuser, Helmut; Hardy, Iris A (1990): Cryosphere/ocean interactions at the margin of the Laurentide ice sheet during the Younger Dryas chron: SE Baffin Shelf, Northwest Territories. Paleoceanography, 5(6), 921-935
-63.83166666666666
-62.78616666666667
61.25
61.78666666666667
Baffin Shelf