Friedrich, Oliver; Norris, Richard D; Bornemann, André; Beckmann, Britta; Pälike, Heiko; Worstell, Paula J; Hofmann, Peter; Wagner, Thomas (2008): Turonian to Coniacian planktic foraminiferal assemblages of ODP Site 207-1259 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.773669, Supplement to: Friedrich, O et al. (2008): Cyclic changes in Turonian to Coniacian planktic foraminiferal assemblages from the tropical Atlantic Ocean. Marine Micropaleontology, 68(3-4), 299-313, https://doi.org/10.1016/j.marmicro.2008.06.003
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Abstract:
Abundance patterns of planktic and benthic foraminifera from a tropical Atlantic drill site (Ocean Drilling Program Site 1259, Demerara Rise, Suriname margin) display a pronounced 400 kyr cyclicity, uninterrupted throughout our ~87.8-92 Ma record, between two clearly distinguishable assemblages: (1) a pelagic foraminifer fauna, which represents a deep oxygen minimum zone, and (2) another assemblage representing a shallow oxygen minimum zone where the foraminifer fauna is dominated by a higher diversity population of mostly small clavate and biserial species common in epicontinental seas. The cyclic changes in the long eccentricity band (400 kyr) between these two assemblages are proposed to reflect changes in the mean latitudinal position of the Intertropical Convergence Zone (ITCZ). Associated fluctuations in precipitation and trade wind strength may have influenced the upwelling regime at Demerara Rise leading to the observed cyclicity of planktic foraminiferal assemblages. The severe Turonian to Coniacian paleoclimatic and paleoceanographic changes in the Atlantic Ocean (e.g., gateway opening, cooling, and glaciation), however, seem to have no influence on the composition of tropical planktic foraminiferal faunas. There is no apparent relationship between foraminifer abundances and a major deflection in the stable isotope record interpreted elsewhere as a sign of the growth and decay of a large polar ice sheet.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 9.300400 * Longitude: -54.199517
Date/Time Start: 2003-02-01T00:00:00 * Date/Time End: 2003-02-16T00:00:00
Event(s):
207-1259 * Latitude: 9.300400 * Longitude: -54.199517 * Date/Time Start: 2003-02-01T00:00:00 * Date/Time End: 2003-02-16T00:00:00 * Elevation: -2354.5 m * Penetration: 1668.7 m * Recovery: 644.9 m * Location: South Atlantic Ocean * Campaign: Leg207 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 104 cores; 929.6 m cored; 739.1 m drilled; 69.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Friedrich, O; Norris, RD; Bornemann, A et al. (2008): (Appendix A2) Calcium carbonate and organic carbon conctent in Turonian to Coniacian sediments of ODP Site 207-1259. https://doi.org/10.1594/PANGAEA.773668
- Friedrich, O; Norris, RD; Bornemann, A et al. (2008): (Appendix A1) Abundances of planktonic and benthic foraminifera in the Turonian to Coniacian sediments of ODP Site 207-1259. https://doi.org/10.1594/PANGAEA.773661