(Table 2) Age determination of Irminger Basin sediment cores

• Main Authors: Elliot, Mary, Labeyrie, Laurent D, Bond, Gerard C, Cortijo, Elsa, Turon, Jean-Louis, Tisnerat, Nadine, Duplessy, Jean-Claude
• Format: Dataset
• Language: English
• Published: PANGAEA 1998
• Subjects: 94-609_Site; Age; 14C milieu/reservoir corrected (-400 yr); dated; dated standard deviation; COMPCORE; Composite Core; DEPTH; sediment/rock; Elevation of event; Event label; Glomar Challenger; Latitude of event; Leg94; Le Suroît; Longitude of event; North Atlantic; North Atlantic/FLANK; PALEOCINAT; PC; Piston corer; SU90-08; SU90-24; V23; V23-81; Vema; Irminger Basin; Ice Shelves; Iceland
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.857864; https://doi.org/10.1594/PANGAEA.857864

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.