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Lackschewitz, Klas S; Baumann, Karl-Heinz; Gehrke, B; Wallrabe-Adams, Hans-Joachim; Thiede, Jörn; Bonani, Georges; Endler, Rudolf; Erlenkeuser, Helmut; Heinemeier, Jan (1998): Sedimentology of the Reykjanes Ridge, Southeast Greenland. PANGAEA, https://doi.org/10.1594/PANGAEA.735768, Supplement to: Lackschewitz, KS et al. (1998): North Atlantic ice sheet fluctuations 10,000-70,000 yr ago as inferred from deposits on the Reykjanes Ridge, southeast of Greenland. Quaternary Research, 49(2), 171-182, https://doi.org/10.1006/qres.1997.1948

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Abstract:
Marine records from the Reykjanes Ridge indicate ice sheet variations and abrupt climate changes. One of these records, ice-rafted detritus (IRD), serves as a proxy for iceberg discharges that probably indicates ice sheet fluctuations. The IRD records suggest that iceberg discharge 68,000-10,000 yr B.P. happened more frequently than the 7000- to 10,000-yr spacing of the Heinrich events. An IRD peak 67,000 to 63,000 yr B.P. further suggests that the Middle Weichselian glaciation started about 12,000 yr earlier in the North Atlantic than in the Norwegian Sea. Several later IRD events, in contrast, correlate with Norwegian Sea IRD-rich layers and imply coeval ice sheet advances in the North Atlantic and the Norwegian Sea. Coccoliths in a core from the Reykjanes Ridge show distinct peaks in species that record occasional inflow of warm surface water during the last glaciation, as previously reported from the eastern Labrador Sea. High abundances of coccoliths, together with a decrease ofNeogloboquadrina pachydermasin. and relatively low delta18O values, imply enhanced advection of the North Atlantic Current 69,000-67,000 yr B.P., 56,000-54,000 yr B.P., 35,000-33,000 yr B.P., and 26,000-23,000 yr B.P. This advection provided a regional moisture source for extension of ice sheets onto the shelf. In contrast, most of the IRD events are characterized by cold polar surface water masses indicating rapid variations in ocean surface conditions.
Coverage:
Median Latitude: 59.125622 * Median Longitude: -30.823211 * South-bound Latitude: 58.942000 * West-bound Longitude: -31.114333 * North-bound Latitude: 59.357333 * East-bound Longitude: -30.478667
Date/Time Start: 1992-10-19T00:00:00 * Date/Time End: 1993-09-11T00:00:00
Event(s):
LO09/21-2 * Latitude: 58.942000 * Longitude: -30.753167 * Date/Time: 1993-09-11T00:00:00 * Elevation: -1437.0 m * Recovery: 5.68 m * Campaign: LO09 * Basis: Professor Logachev * Device: Gravity corer (Kiel type) (SL)
LO09/23-2 * Latitude: 59.029833 * Longitude: -31.114333 * Date/Time: 1993-09-11T00:00:00 * Elevation: -1422.0 m * Recovery: 5.8 m * Campaign: LO09 * Basis: Professor Logachev * Device: Kasten corer (KAL)
SO82_2-1 * Latitude: 59.357333 * Longitude: -31.086333 * Date/Time: 1992-10-19T00:00:00 * Elevation: -1730.0 m * Campaign: SO82 (REYKJANES-RÜCKEN) * Basis: Sonne * Device: Giant box corer (GKG)
Size:
15 datasets

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Datasets listed in this publication series

  1. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): (Table 1) Age determination of sediment core LO09/21-2. https://doi.org/10.1594/PANGAEA.68874
  2. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): (Table 1) Age determination of sediment core LO09/23-2. https://doi.org/10.1594/PANGAEA.68875
  3. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): (Table 1) Age determination of sediment core SO82_2-1. https://doi.org/10.1594/PANGAEA.68876
  4. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): (Table 1) Age determination of sediment core SO82_2-2. https://doi.org/10.1594/PANGAEA.68877
  5. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): (Table 1) Age determination of sediment core SO82_4-1. https://doi.org/10.1594/PANGAEA.68878
  6. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): (Table 1) Age determination of sediment core SO82_4-2. https://doi.org/10.1594/PANGAEA.68879
  7. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): (Table 1) Age determination of sediment core SO82_5-1. https://doi.org/10.1594/PANGAEA.68880
  8. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): (Table 1) Age determination of sediment core SO82_5-2. https://doi.org/10.1594/PANGAEA.68881
  9. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): (Table 1) Age determination of sediment core SO82_7-2. https://doi.org/10.1594/PANGAEA.68882
  10. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): Sediment components and coccolith of core Core SO82-Sediment components and coccolith of core SO82-5. https://doi.org/10.1594/PANGAEA.69498
  11. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): Sediment components of core L008/23. https://doi.org/10.1594/PANGAEA.68904
  12. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): Sediment components of core L009/21. https://doi.org/10.1594/PANGAEA.68903
  13. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): Sediment components of core SO82-2. https://doi.org/10.1594/PANGAEA.68905
  14. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): Sediment components of core SO82-4. https://doi.org/10.1594/PANGAEA.69057
  15. Lackschewitz, KS; Baumann, K-H; Gehrke, B et al. (1998): Sediment components of core SO82-7. https://doi.org/10.1594/PANGAEA.69499