Cenozoic planktonic foraminifera of the Falkland Plateau and Argentine Basin
Sites 511 and 512 (Falkland Plateau) and 513 (Argentine Basin) penetrated calcareous-siliceous oozes of the middle and upper Eocene and lower Oligocene with rather numerous planktonic foraminifers. Upper Oligocene, Miocene, Pliocene, and Quaternary sections are composed mostly of siliceous sediments...
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PANGAEA
1983
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.758393 https://doi.org/10.1594/PANGAEA.758393 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.758393 2023-05-15T13:42:10+02:00 Cenozoic planktonic foraminifera of the Falkland Plateau and Argentine Basin Krasheninnikov, Valery A Basov, Ivan A MEDIAN LATITUDE: -49.485870 * MEDIAN LONGITUDE: -37.485633 * SOUTH-BOUND LATITUDE: -51.004700 * WEST-BOUND LONGITUDE: -46.971700 * NORTH-BOUND LATITUDE: -47.583200 * EAST-BOUND LONGITUDE: -24.640000 * DATE/TIME START: 1980-01-15T00:00:00 * DATE/TIME END: 1980-02-02T00:00:00 1983-03-17 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.758393 https://doi.org/10.1594/PANGAEA.758393 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.758393 https://doi.org/10.1594/PANGAEA.758393 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Krasheninnikov, Valery A; Basov, Ivan A (1983): Cenozoic planktonic foraminifers of the Falkland Plateau and Argentine Basin, Deep Sea Drilling Project Leg 71. In: Ludwig, WF; Krasheninnikov, VA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Government Print Office), 71, 821-858, https://doi.org/10.2973/dsdp.proc.71.130.1983 71-511 71-512 71-512A 71-513 Archive of Ocean Data ARCOD Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg71 South Atlantic/BANK South Atlantic/FLANK South Atlantic/PLATEAU Dataset 1983 ftpangaea https://doi.org/10.1594/PANGAEA.758393 https://doi.org/10.2973/dsdp.proc.71.130.1983 2023-01-20T07:32:06Z Sites 511 and 512 (Falkland Plateau) and 513 (Argentine Basin) penetrated calcareous-siliceous oozes of the middle and upper Eocene and lower Oligocene with rather numerous planktonic foraminifers. Upper Oligocene, Miocene, Pliocene, and Quaternary sections are composed mostly of siliceous sediments (Sites 511-514) where planktonic foraminifers are rare or absent. High-latitude planktonic foraminifers of the Austral Province are characterized by impoverished assemblages - only representatives of Globigerina, Globigerinita, Globorotaloides, and Globorotalia with a rounded peripheral margin are found. In the Paleogene, these species are supplemented, in lesser amounts, by representatives of Globigerapsis, Acarinina, Pseudogloboquadrina, Pseudohastigerina, and Chiloguembelina. Assemblages of planktonic foraminifers have low stratigraphic resolution, especially in the upper Oligocene-Quaternary. This reflects the generally deteriorating Cenozoic climate, which evinced a sharp change in the upper Oligocene that is connected with initiation of the circum-Antarctic current near the Paleogene/Neogene boundary. Comparison of Paleogene and Neogene planktonic foraminifers of the South Atlantic (Falkland Plateau, Argentine Basin, 46-51°S) and the North Atlantic (Rockall Plateau, 55-56°N) indicates that the South Atlantic climate was much colder than that of the same latitudes of the North Atlantic. Paleogene oozes of the Falkland Plateau rest unconf ormably on Maestrichtian sediments and in their turn are overlain unconformably by Neogene-Quaternary oozes. Cenozoic sections are stratigraphically discontinuous: periods of intensive biogenic sedimentation resulting in a thick succession of sediments alternated with periods of nondeposition and strong erosion that resulted in hiatuses and unconformities. In the Argentine Basin, Oligocene calcareous-siliceous oozes rest on basalts of the oceanic basement; they are replaced upward in the section by Neogene-Quaternary siliceous oozes with some hiatuses. Planktonic foraminifers ... Dataset Antarc* Antarctic North Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Austral Argentine Rockall Plateau ENVELOPE(-18.833,-18.833,56.333,56.333) Falkland Plateau ENVELOPE(-50.000,-50.000,-51.000,-51.000) ENVELOPE(-46.971700,-24.640000,-47.583200,-51.004700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
71-511 71-512 71-512A 71-513 Archive of Ocean Data ARCOD Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg71 South Atlantic/BANK South Atlantic/FLANK South Atlantic/PLATEAU |
spellingShingle |
71-511 71-512 71-512A 71-513 Archive of Ocean Data ARCOD Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg71 South Atlantic/BANK South Atlantic/FLANK South Atlantic/PLATEAU Krasheninnikov, Valery A Basov, Ivan A Cenozoic planktonic foraminifera of the Falkland Plateau and Argentine Basin |
topic_facet |
71-511 71-512 71-512A 71-513 Archive of Ocean Data ARCOD Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg71 South Atlantic/BANK South Atlantic/FLANK South Atlantic/PLATEAU |
description |
Sites 511 and 512 (Falkland Plateau) and 513 (Argentine Basin) penetrated calcareous-siliceous oozes of the middle and upper Eocene and lower Oligocene with rather numerous planktonic foraminifers. Upper Oligocene, Miocene, Pliocene, and Quaternary sections are composed mostly of siliceous sediments (Sites 511-514) where planktonic foraminifers are rare or absent. High-latitude planktonic foraminifers of the Austral Province are characterized by impoverished assemblages - only representatives of Globigerina, Globigerinita, Globorotaloides, and Globorotalia with a rounded peripheral margin are found. In the Paleogene, these species are supplemented, in lesser amounts, by representatives of Globigerapsis, Acarinina, Pseudogloboquadrina, Pseudohastigerina, and Chiloguembelina. Assemblages of planktonic foraminifers have low stratigraphic resolution, especially in the upper Oligocene-Quaternary. This reflects the generally deteriorating Cenozoic climate, which evinced a sharp change in the upper Oligocene that is connected with initiation of the circum-Antarctic current near the Paleogene/Neogene boundary. Comparison of Paleogene and Neogene planktonic foraminifers of the South Atlantic (Falkland Plateau, Argentine Basin, 46-51°S) and the North Atlantic (Rockall Plateau, 55-56°N) indicates that the South Atlantic climate was much colder than that of the same latitudes of the North Atlantic. Paleogene oozes of the Falkland Plateau rest unconf ormably on Maestrichtian sediments and in their turn are overlain unconformably by Neogene-Quaternary oozes. Cenozoic sections are stratigraphically discontinuous: periods of intensive biogenic sedimentation resulting in a thick succession of sediments alternated with periods of nondeposition and strong erosion that resulted in hiatuses and unconformities. In the Argentine Basin, Oligocene calcareous-siliceous oozes rest on basalts of the oceanic basement; they are replaced upward in the section by Neogene-Quaternary siliceous oozes with some hiatuses. Planktonic foraminifers ... |
format |
Dataset |
author |
Krasheninnikov, Valery A Basov, Ivan A |
author_facet |
Krasheninnikov, Valery A Basov, Ivan A |
author_sort |
Krasheninnikov, Valery A |
title |
Cenozoic planktonic foraminifera of the Falkland Plateau and Argentine Basin |
title_short |
Cenozoic planktonic foraminifera of the Falkland Plateau and Argentine Basin |
title_full |
Cenozoic planktonic foraminifera of the Falkland Plateau and Argentine Basin |
title_fullStr |
Cenozoic planktonic foraminifera of the Falkland Plateau and Argentine Basin |
title_full_unstemmed |
Cenozoic planktonic foraminifera of the Falkland Plateau and Argentine Basin |
title_sort |
cenozoic planktonic foraminifera of the falkland plateau and argentine basin |
publisher |
PANGAEA |
publishDate |
1983 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.758393 https://doi.org/10.1594/PANGAEA.758393 |
op_coverage |
MEDIAN LATITUDE: -49.485870 * MEDIAN LONGITUDE: -37.485633 * SOUTH-BOUND LATITUDE: -51.004700 * WEST-BOUND LONGITUDE: -46.971700 * NORTH-BOUND LATITUDE: -47.583200 * EAST-BOUND LONGITUDE: -24.640000 * DATE/TIME START: 1980-01-15T00:00:00 * DATE/TIME END: 1980-02-02T00:00:00 |
long_lat |
ENVELOPE(-18.833,-18.833,56.333,56.333) ENVELOPE(-50.000,-50.000,-51.000,-51.000) ENVELOPE(-46.971700,-24.640000,-47.583200,-51.004700) |
geographic |
Antarctic Austral Argentine Rockall Plateau Falkland Plateau |
geographic_facet |
Antarctic Austral Argentine Rockall Plateau Falkland Plateau |
genre |
Antarc* Antarctic North Atlantic Planktonic foraminifera |
genre_facet |
Antarc* Antarctic North Atlantic Planktonic foraminifera |
op_source |
Supplement to: Krasheninnikov, Valery A; Basov, Ivan A (1983): Cenozoic planktonic foraminifers of the Falkland Plateau and Argentine Basin, Deep Sea Drilling Project Leg 71. In: Ludwig, WF; Krasheninnikov, VA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Government Print Office), 71, 821-858, https://doi.org/10.2973/dsdp.proc.71.130.1983 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.758393 https://doi.org/10.1594/PANGAEA.758393 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.758393 https://doi.org/10.2973/dsdp.proc.71.130.1983 |
_version_ |
1766164017432231936 |