Late Cretaceous stratigraphy and paleoceanographic evolution in the Great Australian Bight Basin based on results from IODP Site U1512
The Upper Cretaceous sedimentary sequence at International Ocean Discovery Program Site U1512 in the Ceduna Sub-basin of the Great Australian Bight represents a continuous, N 690 m thick interval of black silty clay and claystone spanning the lower Turonian through Lower Campanian (~10 million years...
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2020
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ftunivnebraskali:oai:digitalcommons.unl.edu:geosciencefacpub-1677 2023-11-12T04:04:20+01:00 Late Cretaceous stratigraphy and paleoceanographic evolution in the Great Australian Bight Basin based on results from IODP Site U1512 MacLeod, K. G. White, Lloyd T. Wainman, Carmine C. Martinez, Mathieu Jones, Matthew M. Batenburg, Sietske J. Riquier, Laurent Haynes, Shannon J. Watkins, David K. Bogus, K. A. Brumsack, H.-J. do Monte Guerra, R. Edgar, Kirsty M. Edvardsen, Trine Harry, Dennis Hasegawa, Takashi Hobbs, R. W. Huber, Brian T. Jiang, T. Kuroda, J. Lee, E. Y. Li, Yong-Xiang Maritatai, Alessandro O'Connor, Lauren K. Petrizzo, Maria Rose Quan, Tracy M. Richter, C. Garcia Tejada, Maria Luisa Tagliaro, G. Wolfgring, Erik Xu, Zhaokai 2020-02-25T08:00:00Z application/pdf https://digitalcommons.unl.edu/geosciencefacpub/667 https://digitalcommons.unl.edu/context/geosciencefacpub/article/1677/viewcontent/MacLeod_GR_2020_Late_Cretaceous_stratigraphy__MS_FINAL.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/geosciencefacpub/667 https://digitalcommons.unl.edu/context/geosciencefacpub/article/1677/viewcontent/MacLeod_GR_2020_Late_Cretaceous_stratigraphy__MS_FINAL.pdf Papers in the Earth and Atmospheric Sciences Cretaceous greenhouse climate Gondwana breakup Cretaceous paleoceanography Great Australian Bight Australo-Antarctic rifting Earth Sciences Oceanography Oceanography and Atmospheric Sciences and Meteorology Paleontology Sedimentology Stratigraphy Tectonics and Structure text 2020 ftunivnebraskali 2023-10-30T12:02:47Z The Upper Cretaceous sedimentary sequence at International Ocean Discovery Program Site U1512 in the Ceduna Sub-basin of the Great Australian Bight represents a continuous, N 690 m thick interval of black silty clay and claystone spanning the lower Turonian through Lower Campanian (~10 million years). Sediments were deposited in an elongate, ~E-W oriented, ~2500 km long rift system that developed between Australia and Antarctica with an open-ocean connection to the west and a continental bridge to the east. Site U1512 cores provide a unique, continuous record of Late Cretaceous deposition in the Ceduna Sub-basin on the hanging wall of the Wallaroo Fault Zone. Study of U1512 samples could provide both an important high-latitude, southern hemisphere perspective on climatic evolution during the peak and demise of the Cretaceous hothouse and an offshore record of the sedimentation history in the basin during the Late Cretaceous portion of the Gondwanan breakup. The Upper Cretaceous sequence at Site U1512 is notable for its lithologic uniformity. Burrow-mottled to massive claystone and silty claystone make up the majority of the almost 700 m section, while rare (n = 28) isolated, 2 to 21 cm thick medium to fine sandstone beds are a minor lithology. Macrofossils present include common inoceramids and rare occurrences of other bivalves and ammonites. Microfossils include common occurrences of calcareous nannofossils, agglutinated and calcareous benthic foraminifera, radiolaria and organic-walled dinoflagellate cysts as well as rare, small, surface dwelling planktonic foraminifera. Carbonate (<7%) and organic carbon (<1.5%) contents are low. Despite the lithologic uniformity, rhythmic alternations in the intensity of magnetic susceptibility and natural gamma radiation are well-resolved in much of the recovered section and continue through minor coring gaps (as documented by downhole logs). Data from Site U1512 provide new perspectives on the deep-water frontier region between Antarctica and Australia. Text Antarc* Antarctic Antarctica Planktonic foraminifera University of Nebraska-Lincoln: DigitalCommons@UNL Antarctic |
institution |
Open Polar |
collection |
University of Nebraska-Lincoln: DigitalCommons@UNL |
op_collection_id |
ftunivnebraskali |
language |
unknown |
topic |
Cretaceous greenhouse climate Gondwana breakup Cretaceous paleoceanography Great Australian Bight Australo-Antarctic rifting Earth Sciences Oceanography Oceanography and Atmospheric Sciences and Meteorology Paleontology Sedimentology Stratigraphy Tectonics and Structure |
spellingShingle |
Cretaceous greenhouse climate Gondwana breakup Cretaceous paleoceanography Great Australian Bight Australo-Antarctic rifting Earth Sciences Oceanography Oceanography and Atmospheric Sciences and Meteorology Paleontology Sedimentology Stratigraphy Tectonics and Structure MacLeod, K. G. White, Lloyd T. Wainman, Carmine C. Martinez, Mathieu Jones, Matthew M. Batenburg, Sietske J. Riquier, Laurent Haynes, Shannon J. Watkins, David K. Bogus, K. A. Brumsack, H.-J. do Monte Guerra, R. Edgar, Kirsty M. Edvardsen, Trine Harry, Dennis Hasegawa, Takashi Hobbs, R. W. Huber, Brian T. Jiang, T. Kuroda, J. Lee, E. Y. Li, Yong-Xiang Maritatai, Alessandro O'Connor, Lauren K. Petrizzo, Maria Rose Quan, Tracy M. Richter, C. Garcia Tejada, Maria Luisa Tagliaro, G. Wolfgring, Erik Xu, Zhaokai Late Cretaceous stratigraphy and paleoceanographic evolution in the Great Australian Bight Basin based on results from IODP Site U1512 |
topic_facet |
Cretaceous greenhouse climate Gondwana breakup Cretaceous paleoceanography Great Australian Bight Australo-Antarctic rifting Earth Sciences Oceanography Oceanography and Atmospheric Sciences and Meteorology Paleontology Sedimentology Stratigraphy Tectonics and Structure |
description |
The Upper Cretaceous sedimentary sequence at International Ocean Discovery Program Site U1512 in the Ceduna Sub-basin of the Great Australian Bight represents a continuous, N 690 m thick interval of black silty clay and claystone spanning the lower Turonian through Lower Campanian (~10 million years). Sediments were deposited in an elongate, ~E-W oriented, ~2500 km long rift system that developed between Australia and Antarctica with an open-ocean connection to the west and a continental bridge to the east. Site U1512 cores provide a unique, continuous record of Late Cretaceous deposition in the Ceduna Sub-basin on the hanging wall of the Wallaroo Fault Zone. Study of U1512 samples could provide both an important high-latitude, southern hemisphere perspective on climatic evolution during the peak and demise of the Cretaceous hothouse and an offshore record of the sedimentation history in the basin during the Late Cretaceous portion of the Gondwanan breakup. The Upper Cretaceous sequence at Site U1512 is notable for its lithologic uniformity. Burrow-mottled to massive claystone and silty claystone make up the majority of the almost 700 m section, while rare (n = 28) isolated, 2 to 21 cm thick medium to fine sandstone beds are a minor lithology. Macrofossils present include common inoceramids and rare occurrences of other bivalves and ammonites. Microfossils include common occurrences of calcareous nannofossils, agglutinated and calcareous benthic foraminifera, radiolaria and organic-walled dinoflagellate cysts as well as rare, small, surface dwelling planktonic foraminifera. Carbonate (<7%) and organic carbon (<1.5%) contents are low. Despite the lithologic uniformity, rhythmic alternations in the intensity of magnetic susceptibility and natural gamma radiation are well-resolved in much of the recovered section and continue through minor coring gaps (as documented by downhole logs). Data from Site U1512 provide new perspectives on the deep-water frontier region between Antarctica and Australia. |
format |
Text |
author |
MacLeod, K. G. White, Lloyd T. Wainman, Carmine C. Martinez, Mathieu Jones, Matthew M. Batenburg, Sietske J. Riquier, Laurent Haynes, Shannon J. Watkins, David K. Bogus, K. A. Brumsack, H.-J. do Monte Guerra, R. Edgar, Kirsty M. Edvardsen, Trine Harry, Dennis Hasegawa, Takashi Hobbs, R. W. Huber, Brian T. Jiang, T. Kuroda, J. Lee, E. Y. Li, Yong-Xiang Maritatai, Alessandro O'Connor, Lauren K. Petrizzo, Maria Rose Quan, Tracy M. Richter, C. Garcia Tejada, Maria Luisa Tagliaro, G. Wolfgring, Erik Xu, Zhaokai |
author_facet |
MacLeod, K. G. White, Lloyd T. Wainman, Carmine C. Martinez, Mathieu Jones, Matthew M. Batenburg, Sietske J. Riquier, Laurent Haynes, Shannon J. Watkins, David K. Bogus, K. A. Brumsack, H.-J. do Monte Guerra, R. Edgar, Kirsty M. Edvardsen, Trine Harry, Dennis Hasegawa, Takashi Hobbs, R. W. Huber, Brian T. Jiang, T. Kuroda, J. Lee, E. Y. Li, Yong-Xiang Maritatai, Alessandro O'Connor, Lauren K. Petrizzo, Maria Rose Quan, Tracy M. Richter, C. Garcia Tejada, Maria Luisa Tagliaro, G. Wolfgring, Erik Xu, Zhaokai |
author_sort |
MacLeod, K. G. |
title |
Late Cretaceous stratigraphy and paleoceanographic evolution in the Great Australian Bight Basin based on results from IODP Site U1512 |
title_short |
Late Cretaceous stratigraphy and paleoceanographic evolution in the Great Australian Bight Basin based on results from IODP Site U1512 |
title_full |
Late Cretaceous stratigraphy and paleoceanographic evolution in the Great Australian Bight Basin based on results from IODP Site U1512 |
title_fullStr |
Late Cretaceous stratigraphy and paleoceanographic evolution in the Great Australian Bight Basin based on results from IODP Site U1512 |
title_full_unstemmed |
Late Cretaceous stratigraphy and paleoceanographic evolution in the Great Australian Bight Basin based on results from IODP Site U1512 |
title_sort |
late cretaceous stratigraphy and paleoceanographic evolution in the great australian bight basin based on results from iodp site u1512 |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2020 |
url |
https://digitalcommons.unl.edu/geosciencefacpub/667 https://digitalcommons.unl.edu/context/geosciencefacpub/article/1677/viewcontent/MacLeod_GR_2020_Late_Cretaceous_stratigraphy__MS_FINAL.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Planktonic foraminifera |
genre_facet |
Antarc* Antarctic Antarctica Planktonic foraminifera |
op_source |
Papers in the Earth and Atmospheric Sciences |
op_relation |
https://digitalcommons.unl.edu/geosciencefacpub/667 https://digitalcommons.unl.edu/context/geosciencefacpub/article/1677/viewcontent/MacLeod_GR_2020_Late_Cretaceous_stratigraphy__MS_FINAL.pdf |
_version_ |
1782341589772795904 |