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dc.contributor.authorMantilla Duran, Fernando
dc.date.accessioned2013-08-07T20:00:26Z
dc.date.available2013-08-07T20:00:26Z
dc.date.issued2013-08-07
dc.identifier.urihttp://hdl.handle.net/10464/4739
dc.description.abstractIntegrated Ocean Drilling Program (IODP) Site U1313, located at the northern boundary of the subtropical gyre in the central North Atlantic, lies within the southern part of the ice-rafted debris belt. Seventy-three palynological samples were studied from an uninterrupted interval ca. 726–603 ka (upper Marine Isotope Stage [MIS] 18 through lower MIS 15) to resolve conflicting paleoceanographic interpretations. Glacial stages were characterized by high productivity surface waters reflecting a southward shift of the Arctic Front. Sea surface salinities (SSSs) and sea surface temperatures (SSTs) were obtained by transfer functions using the Modern Analogue Technique. The lowest SSTs of 9ºC (±1.3) and 10ºC (±1.3) were recorded in glacial MIS 16 and MIS 18 respectively. However, these reconstructions are influenced by abundant heterotrophic taxa and may reflect elevated nutrient levels rather than lowered temperatures. Reworked palynomorphs uniquely indicate a Cretaceous as well as Paleozoic provenance for the first Heinrich-like events.en_US
dc.language.isoengen_US
dc.publisherBrock Universityen_US
dc.subjectPalynologyen_US
dc.subjectPaleoceanographyen_US
dc.subjectCentral North Atlanticen_US
dc.subjectMiddle Pleistoceneen_US
dc.titleCENTRAL NORTH ATLANTIC PALEOCEANOGRAPHY DURING THE MIDDLE PLEISTOCENE (ca. 726–603 ka): INSIGHTS FROM THE DINOFLAGELLATE CYST RECORDen_US
dc.typeElectronic Thesis or Dissertationen
dc.degree.nameM.Sc. Earth Sciencesen_US
dc.degree.levelMastersen_US
dc.contributor.departmentDepartment of Earth Sciencesen_US
dc.degree.disciplineFaculty of Mathematics and Scienceen_US
dc.embargo.termsNoneen_US
refterms.dateFOA2021-08-03T02:23:36Z


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