Long-term Late Cretaceous oxygen- and carbon-isotope trends and planktonic foraminiferal turnover: A new record from the southern midlatitudes
The ∼35-m.y.-long Late Cretaceous greenhouse climate has been the subject of a number of studies, with emphasis on the Cenomanian–Turonian and late Campanian–Maastrichtian intervals. By contrast, far less information is available for the Turonian–early Campanian interval, even though it encompasses...
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Online Access: | https://hdl.handle.net/2434/1017129 https://doi.org/10.1130/b31399.1 |
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ftunivmilanoair:oai:air.unimi.it:2434/1017129 2024-04-21T08:10:32+00:00 Long-term Late Cretaceous oxygen- and carbon-isotope trends and planktonic foraminiferal turnover: A new record from the southern midlatitudes Falzoni, F. Petrizzo, M. R. Clarke, L. J. MacLeod, K. G. Jenkyns, H. C. F. Falzoni M.R. Petrizzo L.J. Clarke K.G. Macleod H.C. Jenkyns 2016-11 https://hdl.handle.net/2434/1017129 https://doi.org/10.1130/b31399.1 eng eng Geological Society of America info:eu-repo/semantics/altIdentifier/wos/WOS:000390988300009 volume:128 issue:11-12 firstpage:1725 lastpage:1735 numberofpages:11 journal:GEOLOGICAL SOCIETY OF AMERICA BULLETIN https://hdl.handle.net/2434/1017129 doi:10.1130/b31399.1 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84984955321 info:eu-repo/semantics/openAccess Settore GEO/01 - Paleontologia e Paleoecologia info:eu-repo/semantics/article 2016 ftunivmilanoair https://doi.org/10.1130/b31399.1 2024-03-27T16:18:05Z The ∼35-m.y.-long Late Cretaceous greenhouse climate has been the subject of a number of studies, with emphasis on the Cenomanian–Turonian and late Campanian–Maastrichtian intervals. By contrast, far less information is available for the Turonian–early Campanian interval, even though it encompasses the transition out of the extreme warmth of the Cenomanian–Turonian greenhouse climate optimum and includes an ∼3-m.y.-long mid-Coniacian–mid-Santonian interval when planktonic foraminifera underwent a large-scale, but poorly understood, turnover. This study presents ∼1350 δ18O and δ13C values of well-preserved benthic and planktonic foraminifera and of the <63 μm size fraction from the Exmouth Plateau off Australia (eastern Indian Ocean). These data provide: (1) the most continuous, highly resolved, and stratigraphically well-constrained record of long-term trends in Late Cretaceous oxygen- and carbon-isotope ratios from the southern midlatitudes, and (2) new information on the paleoecological preferences of planktonic foraminiferal taxa. The results indicate persistent warmth from the early Turonian until the mid-Santonian, cooling from the mid-Santonian through the mid-Campanian, and short-term climatic variability during the late Campanian–Maastrichtian. Moreover, our results suggest the cause of Coniacian–Santonian turnover among planktonic foraminifera may have been the diversification of a temperature- and/or salinity-tolerant genus (Marginotruncana), and the cause of the Santonian–early Campanian extinction of Dicarinella and Marginotruncana may have been surface-ocean cooling and competition with globotruncanids. Article in Journal/Newspaper Planktonic foraminifera The University of Milan: Archivio Istituzionale della Ricerca (AIR) Geological Society of America Bulletin 128 11-12 1725 1735 |
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Open Polar |
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The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
op_collection_id |
ftunivmilanoair |
language |
English |
topic |
Settore GEO/01 - Paleontologia e Paleoecologia |
spellingShingle |
Settore GEO/01 - Paleontologia e Paleoecologia Falzoni, F. Petrizzo, M. R. Clarke, L. J. MacLeod, K. G. Jenkyns, H. C. Long-term Late Cretaceous oxygen- and carbon-isotope trends and planktonic foraminiferal turnover: A new record from the southern midlatitudes |
topic_facet |
Settore GEO/01 - Paleontologia e Paleoecologia |
description |
The ∼35-m.y.-long Late Cretaceous greenhouse climate has been the subject of a number of studies, with emphasis on the Cenomanian–Turonian and late Campanian–Maastrichtian intervals. By contrast, far less information is available for the Turonian–early Campanian interval, even though it encompasses the transition out of the extreme warmth of the Cenomanian–Turonian greenhouse climate optimum and includes an ∼3-m.y.-long mid-Coniacian–mid-Santonian interval when planktonic foraminifera underwent a large-scale, but poorly understood, turnover. This study presents ∼1350 δ18O and δ13C values of well-preserved benthic and planktonic foraminifera and of the <63 μm size fraction from the Exmouth Plateau off Australia (eastern Indian Ocean). These data provide: (1) the most continuous, highly resolved, and stratigraphically well-constrained record of long-term trends in Late Cretaceous oxygen- and carbon-isotope ratios from the southern midlatitudes, and (2) new information on the paleoecological preferences of planktonic foraminiferal taxa. The results indicate persistent warmth from the early Turonian until the mid-Santonian, cooling from the mid-Santonian through the mid-Campanian, and short-term climatic variability during the late Campanian–Maastrichtian. Moreover, our results suggest the cause of Coniacian–Santonian turnover among planktonic foraminifera may have been the diversification of a temperature- and/or salinity-tolerant genus (Marginotruncana), and the cause of the Santonian–early Campanian extinction of Dicarinella and Marginotruncana may have been surface-ocean cooling and competition with globotruncanids. |
author2 |
F. Falzoni M.R. Petrizzo L.J. Clarke K.G. Macleod H.C. Jenkyns |
format |
Article in Journal/Newspaper |
author |
Falzoni, F. Petrizzo, M. R. Clarke, L. J. MacLeod, K. G. Jenkyns, H. C. |
author_facet |
Falzoni, F. Petrizzo, M. R. Clarke, L. J. MacLeod, K. G. Jenkyns, H. C. |
author_sort |
Falzoni, F. |
title |
Long-term Late Cretaceous oxygen- and carbon-isotope trends and planktonic foraminiferal turnover: A new record from the southern midlatitudes |
title_short |
Long-term Late Cretaceous oxygen- and carbon-isotope trends and planktonic foraminiferal turnover: A new record from the southern midlatitudes |
title_full |
Long-term Late Cretaceous oxygen- and carbon-isotope trends and planktonic foraminiferal turnover: A new record from the southern midlatitudes |
title_fullStr |
Long-term Late Cretaceous oxygen- and carbon-isotope trends and planktonic foraminiferal turnover: A new record from the southern midlatitudes |
title_full_unstemmed |
Long-term Late Cretaceous oxygen- and carbon-isotope trends and planktonic foraminiferal turnover: A new record from the southern midlatitudes |
title_sort |
long-term late cretaceous oxygen- and carbon-isotope trends and planktonic foraminiferal turnover: a new record from the southern midlatitudes |
publisher |
Geological Society of America |
publishDate |
2016 |
url |
https://hdl.handle.net/2434/1017129 https://doi.org/10.1130/b31399.1 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000390988300009 volume:128 issue:11-12 firstpage:1725 lastpage:1735 numberofpages:11 journal:GEOLOGICAL SOCIETY OF AMERICA BULLETIN https://hdl.handle.net/2434/1017129 doi:10.1130/b31399.1 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84984955321 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1130/b31399.1 |
container_title |
Geological Society of America Bulletin |
container_volume |
128 |
container_issue |
11-12 |
container_start_page |
1725 |
op_container_end_page |
1735 |
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1796952016734388224 |