Micropaleontological investigation of sediment core Kronsmoor, supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247
Benthic foraminiferal and calcareous nannofossil assemblages, as well as stable isotope data from the Campanian/Maastrichtian boundary interval (~71.4 to ~70.7 Ma) of the Kronsmoor section (North German Basin), were investigated in order to characterize changes in surface-water productivity and oxyg...
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ftdatacite:10.1594/pangaea.736977 2023-05-15T17:36:55+02:00 Micropaleontological investigation of sediment core Kronsmoor, supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247 Friedrich, Oliver Herrle, Jens O Hemleben, Christoph 2005 application/zip https://dx.doi.org/10.1594/pangaea.736977 https://doi.pangaea.de/10.1594/PANGAEA.736977 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2113/35.3.228 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Multiple investigations article Supplementary Collection of Datasets Collection 2005 ftdatacite https://doi.org/10.1594/pangaea.736977 https://doi.org/10.2113/35.3.228 2022-02-09T13:22:28Z Benthic foraminiferal and calcareous nannofossil assemblages, as well as stable isotope data from the Campanian/Maastrichtian boundary interval (~71.4 to ~70.7 Ma) of the Kronsmoor section (North German Basin), were investigated in order to characterize changes in surface-water productivity and oxygen content at the seafloor and their link to climatic and paleoceanographic changes. A nutrient index based on calcareous nannofossils is derived for the high-latitude, epicontinental North German Basin, reflecting changes in surface-water productivity. Oxygen isotopes of well-preserved planktic foraminiferal specimens of Heterohelix globulosa reflect warmer surface-water temperatures in the lower part of the studied succession and a cooling of up to 2°C (0.5 per mil) in the upper part (after 71.1 Ma). For the lower and warmer part of the investigated succession, benthic foraminiferal assemblages and the calcareous nannofossils indicate well-oxygenated bottom waters and low-surface water productivity. In contrast, the upper part of the succession is characterized by cooler conditions, lower oxygen content at the seafloor and increasing surface-water productivity. It is proposed that the cooling phase starting at 71.1 Ma was accompanied by increasing surface-water mixing caused by westerly winds. As a consequence of mixing, nutrients were advected from sub-surface waters into the mixed layer, resulting in increased surface-water productivity and enhanced organic matter flux to the seafloor. We hypothesize that global sea-level fall during the earliest Maastrichtian (~71.3 Ma), indicated by decreasing carbon isotope values, may have led to a weaker water mass exchange through narrower gateways between the Boreal Realm and the open North Atlantic and Tethys oceans. Both the weaker water mass exchange and enhanced surface-water productivity may have led to slightly less ventilated bottom waters of the upper part of the studied section. Our micro-paleontological and stable isotopic approach indicates short-term (<100 kyr) changes in oxygen consumption at the seafloor and surface-water productivity across the homogeneous Boreal White Chalk succession of the North German Basin. : Project: Kuehlokrei Article in Journal/Newspaper North Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Multiple investigations |
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Multiple investigations Friedrich, Oliver Herrle, Jens O Hemleben, Christoph Micropaleontological investigation of sediment core Kronsmoor, supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247 |
topic_facet |
Multiple investigations |
description |
Benthic foraminiferal and calcareous nannofossil assemblages, as well as stable isotope data from the Campanian/Maastrichtian boundary interval (~71.4 to ~70.7 Ma) of the Kronsmoor section (North German Basin), were investigated in order to characterize changes in surface-water productivity and oxygen content at the seafloor and their link to climatic and paleoceanographic changes. A nutrient index based on calcareous nannofossils is derived for the high-latitude, epicontinental North German Basin, reflecting changes in surface-water productivity. Oxygen isotopes of well-preserved planktic foraminiferal specimens of Heterohelix globulosa reflect warmer surface-water temperatures in the lower part of the studied succession and a cooling of up to 2°C (0.5 per mil) in the upper part (after 71.1 Ma). For the lower and warmer part of the investigated succession, benthic foraminiferal assemblages and the calcareous nannofossils indicate well-oxygenated bottom waters and low-surface water productivity. In contrast, the upper part of the succession is characterized by cooler conditions, lower oxygen content at the seafloor and increasing surface-water productivity. It is proposed that the cooling phase starting at 71.1 Ma was accompanied by increasing surface-water mixing caused by westerly winds. As a consequence of mixing, nutrients were advected from sub-surface waters into the mixed layer, resulting in increased surface-water productivity and enhanced organic matter flux to the seafloor. We hypothesize that global sea-level fall during the earliest Maastrichtian (~71.3 Ma), indicated by decreasing carbon isotope values, may have led to a weaker water mass exchange through narrower gateways between the Boreal Realm and the open North Atlantic and Tethys oceans. Both the weaker water mass exchange and enhanced surface-water productivity may have led to slightly less ventilated bottom waters of the upper part of the studied section. Our micro-paleontological and stable isotopic approach indicates short-term (<100 kyr) changes in oxygen consumption at the seafloor and surface-water productivity across the homogeneous Boreal White Chalk succession of the North German Basin. : Project: Kuehlokrei |
format |
Article in Journal/Newspaper |
author |
Friedrich, Oliver Herrle, Jens O Hemleben, Christoph |
author_facet |
Friedrich, Oliver Herrle, Jens O Hemleben, Christoph |
author_sort |
Friedrich, Oliver |
title |
Micropaleontological investigation of sediment core Kronsmoor, supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247 |
title_short |
Micropaleontological investigation of sediment core Kronsmoor, supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247 |
title_full |
Micropaleontological investigation of sediment core Kronsmoor, supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247 |
title_fullStr |
Micropaleontological investigation of sediment core Kronsmoor, supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247 |
title_full_unstemmed |
Micropaleontological investigation of sediment core Kronsmoor, supplement to: Friedrich, Oliver; Herrle, Jens O; Hemleben, Christoph (2005): Climatic changes in the Late Campanian through Early Maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. Journal of Foraminiferal Research, 35(3), 228-247 |
title_sort |
micropaleontological investigation of sediment core kronsmoor, supplement to: friedrich, oliver; herrle, jens o; hemleben, christoph (2005): climatic changes in the late campanian through early maastrichtian: micropaleontological and stable isotopic evidence from an epicontinental sea. journal of foraminiferal research, 35(3), 228-247 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2005 |
url |
https://dx.doi.org/10.1594/pangaea.736977 https://doi.pangaea.de/10.1594/PANGAEA.736977 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://dx.doi.org/10.2113/35.3.228 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.736977 https://doi.org/10.2113/35.3.228 |
_version_ |
1766136560352231424 |