Paleoceanographic changes during the Albian–Cenomanian in the Tethys and North Atlantic and the onset of the Cretaceous chalk.
During the mid-Cretaceous the Earth was characterized by peculiar climatic and oceanographic features, such as very high temperatures, smooth thermal meridional gradient, long-term rising sea level, and formation of oceanic gateways and seaways. At that time widespread deposition of micritic pelagic...
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Online Access: | http://hdl.handle.net/11576/2619398 https://doi.org/10.1016/j.gloplacha.2015.01.005 |
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ftunivurbino:oai:ora.uniurb.it:11576/2619398 2024-04-14T08:15:32+00:00 Paleoceanographic changes during the Albian–Cenomanian in the Tethys and North Atlantic and the onset of the Cretaceous chalk. Giorgioni, Martino Weissert, Helmut Bernasconi, Stefano Hochuli, Peter A. Keller, Christina E. Petrizzo, Maria Rose Lukeneder, Alexander Garcia, Therese I. COCCIONI, RODOLFO Giorgioni, Martino Weissert, Helmut Bernasconi, Stefano Hochuli, Peter A. Keller, Christina E. Coccioni, Rodolfo Petrizzo, Maria Rose Lukeneder, Alexander Garcia, Therese I. 2015 STAMPA http://hdl.handle.net/11576/2619398 https://doi.org/10.1016/j.gloplacha.2015.01.005 eng eng info:eu-repo/semantics/altIdentifier/wos/000350181300005 volume:126 firstpage:46 lastpage:61 numberofpages:16 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/11576/2619398 doi:10.1016/j.gloplacha.2015.01.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84921475231 mid-Cretaceou Carbon isotope Tethy North Atlantic chalk paleoceanography info:eu-repo/semantics/article 2015 ftunivurbino https://doi.org/10.1016/j.gloplacha.2015.01.005 2024-03-21T17:08:45Z During the mid-Cretaceous the Earth was characterized by peculiar climatic and oceanographic features, such as very high temperatures, smooth thermal meridional gradient, long-term rising sea level, and formation of oceanic gateways and seaways. At that time widespread deposition of micritic pelagic limestones, generally called chalk, occurred in deep pelagic settings as well as in epeiric seas, both at tropical and at high latitudes. The origin of such extensive chalk deposition in the mid-Cretaceous is a complex and still controversial issue, which involves the interaction of several different factors. In this work we address this topic from the paleoceanographic perspective, by investigating the contribution of major oceanic circulation changes. We characterize several stratigraphic sections from the Tethys and North Atlantic with litho-, bio-, and carbon isotope stratigraphy. Our data show a change between two different oceanic circulation modes happening in the Late Albian. The first is an unstable mode, with oceanographic conditions fluctuating frequently in response to rapid environmental and climatic changes, such as those driven by orbital forcing. The second mode is more stable, with better connection between the different oceanic basins, a more stable thermocline, more persistent current flow, better defined upwelling and downwelling areas, and a more balanced oceanic carbon reservoir. We propose that under the mid-Cretaceous paleogeographic and paleodimatic conditions this change in oceanic circulation mode favored the beginning of chalk sedimentation in deep-water settings. Article in Journal/Newspaper North Atlantic Università degli Studi di Urbino: CINECA IRIS Global and Planetary Change 126 46 61 |
institution |
Open Polar |
collection |
Università degli Studi di Urbino: CINECA IRIS |
op_collection_id |
ftunivurbino |
language |
English |
topic |
mid-Cretaceou Carbon isotope Tethy North Atlantic chalk paleoceanography |
spellingShingle |
mid-Cretaceou Carbon isotope Tethy North Atlantic chalk paleoceanography Giorgioni, Martino Weissert, Helmut Bernasconi, Stefano Hochuli, Peter A. Keller, Christina E. Petrizzo, Maria Rose Lukeneder, Alexander Garcia, Therese I. COCCIONI, RODOLFO Paleoceanographic changes during the Albian–Cenomanian in the Tethys and North Atlantic and the onset of the Cretaceous chalk. |
topic_facet |
mid-Cretaceou Carbon isotope Tethy North Atlantic chalk paleoceanography |
description |
During the mid-Cretaceous the Earth was characterized by peculiar climatic and oceanographic features, such as very high temperatures, smooth thermal meridional gradient, long-term rising sea level, and formation of oceanic gateways and seaways. At that time widespread deposition of micritic pelagic limestones, generally called chalk, occurred in deep pelagic settings as well as in epeiric seas, both at tropical and at high latitudes. The origin of such extensive chalk deposition in the mid-Cretaceous is a complex and still controversial issue, which involves the interaction of several different factors. In this work we address this topic from the paleoceanographic perspective, by investigating the contribution of major oceanic circulation changes. We characterize several stratigraphic sections from the Tethys and North Atlantic with litho-, bio-, and carbon isotope stratigraphy. Our data show a change between two different oceanic circulation modes happening in the Late Albian. The first is an unstable mode, with oceanographic conditions fluctuating frequently in response to rapid environmental and climatic changes, such as those driven by orbital forcing. The second mode is more stable, with better connection between the different oceanic basins, a more stable thermocline, more persistent current flow, better defined upwelling and downwelling areas, and a more balanced oceanic carbon reservoir. We propose that under the mid-Cretaceous paleogeographic and paleodimatic conditions this change in oceanic circulation mode favored the beginning of chalk sedimentation in deep-water settings. |
author2 |
Giorgioni, Martino Weissert, Helmut Bernasconi, Stefano Hochuli, Peter A. Keller, Christina E. Coccioni, Rodolfo Petrizzo, Maria Rose Lukeneder, Alexander Garcia, Therese I. |
format |
Article in Journal/Newspaper |
author |
Giorgioni, Martino Weissert, Helmut Bernasconi, Stefano Hochuli, Peter A. Keller, Christina E. Petrizzo, Maria Rose Lukeneder, Alexander Garcia, Therese I. COCCIONI, RODOLFO |
author_facet |
Giorgioni, Martino Weissert, Helmut Bernasconi, Stefano Hochuli, Peter A. Keller, Christina E. Petrizzo, Maria Rose Lukeneder, Alexander Garcia, Therese I. COCCIONI, RODOLFO |
author_sort |
Giorgioni, Martino |
title |
Paleoceanographic changes during the Albian–Cenomanian in the Tethys and North Atlantic and the onset of the Cretaceous chalk. |
title_short |
Paleoceanographic changes during the Albian–Cenomanian in the Tethys and North Atlantic and the onset of the Cretaceous chalk. |
title_full |
Paleoceanographic changes during the Albian–Cenomanian in the Tethys and North Atlantic and the onset of the Cretaceous chalk. |
title_fullStr |
Paleoceanographic changes during the Albian–Cenomanian in the Tethys and North Atlantic and the onset of the Cretaceous chalk. |
title_full_unstemmed |
Paleoceanographic changes during the Albian–Cenomanian in the Tethys and North Atlantic and the onset of the Cretaceous chalk. |
title_sort |
paleoceanographic changes during the albian–cenomanian in the tethys and north atlantic and the onset of the cretaceous chalk. |
publishDate |
2015 |
url |
http://hdl.handle.net/11576/2619398 https://doi.org/10.1016/j.gloplacha.2015.01.005 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000350181300005 volume:126 firstpage:46 lastpage:61 numberofpages:16 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/11576/2619398 doi:10.1016/j.gloplacha.2015.01.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84921475231 |
op_doi |
https://doi.org/10.1016/j.gloplacha.2015.01.005 |
container_title |
Global and Planetary Change |
container_volume |
126 |
container_start_page |
46 |
op_container_end_page |
61 |
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1796313891824730112 |