(Table 2) Age determination of Irminger Basin sediment cores ...
High-resolution records of coarse lithic content and oxygen isotope have been obtained in a piston core from the Irminger Basin. The last glacial period is characterized by numerous periods of increased iceberg discharges originating partly from Iceland and corresponding to millennial-scale instabil...
Main Authors: | , , , , , , |
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Format: | Dataset |
Language: | English |
Published: |
PANGAEA
1998
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Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.857864 https://doi.pangaea.de/10.1594/PANGAEA.857864 |
Summary: | High-resolution records of coarse lithic content and oxygen isotope have been obtained in a piston core from the Irminger Basin. The last glacial period is characterized by numerous periods of increased iceberg discharges originating partly from Iceland and corresponding to millennial-scale instabilities of the coastal ice sheets and ice shelves in the Nordic area. A comparison with midlatitude sediment cores shows that ice-rafted material corresponding to the Heinrich events was deposited synchronously from 40° to 60°N. There are thus two oscillating systems: every 5-10 kyr massive iceberg armadas are released from large continental ice caps, whereas more frequent instabilities of the coastal ice sheets in the high latitude regions occur every 1.2-3.8 kyr. At the time of the Heinrich events the synchroneity of the response from all the northern hemisphere ice sheets attests the existence of strong interactions between the two systems. ... : Data for core SU90-08 is from Grousset el al. (1993), Cortijo et al. (1997), and Vidal et al. (1997), and data from ODP site 609 and core V23-81 are from Bond and Lotti (1995). ... |
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