Middle Eocene to Pleistocene calcareous nannofossils of ODP Leg 113 holes, supplement to: Wei, Wuchang; Wise, Sherwood W (1990): Middle Eocene to Pleistocene calcareous nannofossils recovered by Ocean Drilling Program Leg 113 in the Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 639-666
Long sequences of Upper Cretaceous through Quaternary sediments rich in calcareous and siliceous microfossils were recovered at Ocean Drilling Program Sites 689 and 690 on Maud Rise off East Antarctica. These sites have become the southernmost anchor in the Atlantic Basin for bio-, magneto-, chemost...
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1990
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Online Access: | https://dx.doi.org/10.1594/pangaea.746712 https://doi.pangaea.de/10.1594/PANGAEA.746712 |
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ftdatacite:10.1594/pangaea.746712 2023-05-15T13:47:34+02:00 Middle Eocene to Pleistocene calcareous nannofossils of ODP Leg 113 holes, supplement to: Wei, Wuchang; Wise, Sherwood W (1990): Middle Eocene to Pleistocene calcareous nannofossils recovered by Ocean Drilling Program Leg 113 in the Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 639-666 Wei, Wuchang Wise, Sherwood W 1990 application/zip https://dx.doi.org/10.1594/pangaea.746712 https://doi.pangaea.de/10.1594/PANGAEA.746712 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2973/odp.proc.sr.113.125.1990 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Drilling/drill rig Leg113 Joides Resolution Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 1990 ftdatacite https://doi.org/10.1594/pangaea.746712 https://doi.org/10.2973/odp.proc.sr.113.125.1990 2022-02-08T16:24:46Z Long sequences of Upper Cretaceous through Quaternary sediments rich in calcareous and siliceous microfossils were recovered at Ocean Drilling Program Sites 689 and 690 on Maud Rise off East Antarctica. These sites have become the southernmost anchor in the Atlantic Basin for bio-, magneto-, chemostratigraphic, and paleobiogeographic studies. ODP Sites 692 and 693 on the Weddell Sea margin of East Antarctica and Site 696 on the South Orkney microcontinent of West Antarctica yielded calcareous nannofossils within some stratigraphic intervals. Sites 691, 692, 694, 695, and 697 did not recover Cenozoic calcareous nannofossils.Calcareous nannofossil biostratigraphy suggests a major hiatus across the Paleogene/Neogene boundary at Sites 689 and 690, and two additional hiatuses in the middle Eocene-lower Oligocene section at Site 690. Correlation with magnetostratigraphy reveals: the last occurrence (LO) of Reticulofenestra umbilica at Maud Rise is over 1 m.y. younger than that at the middle-latitude sites; the LO of Isthmolithus recurvus is synchronous in the middle-latitude and high-latitude areas (about 34.8 Ma); Reticulofenestra oamaruensis ranges from 38.0 to 36.0 Ma at Maud Rise; Reticulofenestra reticulata has a shorter range at Maud Rise (42.1 to 38.9 Ma) than at the middle-latitude DSDP Site 516; the range of Chiasmolithus oamaruensis is diachronous over different latitudes; and the LO of Chiasmolithus solitus is a good datum at 41.3 Ma from 30°S to 65°S in the South Atlantic Ocean.Comparison of calcareous nannofossil abundances in a latitudinal transect shows: Reticulofenestra bisecta is a temperate-water species and its LO, which crosses below that of Chiasmolithus altus at Maud Rise, is not applicable for the Paleogene/Neogene boundary in high southern latitude areas; Clausicoccus fenestratus is rare or absent at Maud Rise and can not be used as a marker; Coccolithus formosus is a warm-water species which disappeared earlier toward higher latitudes. Calcareous nannofossil assemblages indicate that by at least the middle Eocene, surface water temperatures became considerably lower in the high southern latitudes than in the middle-latitude areas and that there have been more extreme cold events in the high latitudes during the Neogene. Bicolumnus ovatus n. gen., n. sp. is proposed in this paper. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Weddell Sea West Antarctica DataCite Metadata Store (German National Library of Science and Technology) East Antarctica Kennett ENVELOPE(-65.167,-65.167,-67.117,-67.117) Maud Rise ENVELOPE(3.000,3.000,-66.000,-66.000) Weddell Weddell Sea West Antarctica |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Leg113 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Drilling/drill rig Leg113 Joides Resolution Ocean Drilling Program ODP Wei, Wuchang Wise, Sherwood W Middle Eocene to Pleistocene calcareous nannofossils of ODP Leg 113 holes, supplement to: Wei, Wuchang; Wise, Sherwood W (1990): Middle Eocene to Pleistocene calcareous nannofossils recovered by Ocean Drilling Program Leg 113 in the Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 639-666 |
topic_facet |
Drilling/drill rig Leg113 Joides Resolution Ocean Drilling Program ODP |
description |
Long sequences of Upper Cretaceous through Quaternary sediments rich in calcareous and siliceous microfossils were recovered at Ocean Drilling Program Sites 689 and 690 on Maud Rise off East Antarctica. These sites have become the southernmost anchor in the Atlantic Basin for bio-, magneto-, chemostratigraphic, and paleobiogeographic studies. ODP Sites 692 and 693 on the Weddell Sea margin of East Antarctica and Site 696 on the South Orkney microcontinent of West Antarctica yielded calcareous nannofossils within some stratigraphic intervals. Sites 691, 692, 694, 695, and 697 did not recover Cenozoic calcareous nannofossils.Calcareous nannofossil biostratigraphy suggests a major hiatus across the Paleogene/Neogene boundary at Sites 689 and 690, and two additional hiatuses in the middle Eocene-lower Oligocene section at Site 690. Correlation with magnetostratigraphy reveals: the last occurrence (LO) of Reticulofenestra umbilica at Maud Rise is over 1 m.y. younger than that at the middle-latitude sites; the LO of Isthmolithus recurvus is synchronous in the middle-latitude and high-latitude areas (about 34.8 Ma); Reticulofenestra oamaruensis ranges from 38.0 to 36.0 Ma at Maud Rise; Reticulofenestra reticulata has a shorter range at Maud Rise (42.1 to 38.9 Ma) than at the middle-latitude DSDP Site 516; the range of Chiasmolithus oamaruensis is diachronous over different latitudes; and the LO of Chiasmolithus solitus is a good datum at 41.3 Ma from 30°S to 65°S in the South Atlantic Ocean.Comparison of calcareous nannofossil abundances in a latitudinal transect shows: Reticulofenestra bisecta is a temperate-water species and its LO, which crosses below that of Chiasmolithus altus at Maud Rise, is not applicable for the Paleogene/Neogene boundary in high southern latitude areas; Clausicoccus fenestratus is rare or absent at Maud Rise and can not be used as a marker; Coccolithus formosus is a warm-water species which disappeared earlier toward higher latitudes. Calcareous nannofossil assemblages indicate that by at least the middle Eocene, surface water temperatures became considerably lower in the high southern latitudes than in the middle-latitude areas and that there have been more extreme cold events in the high latitudes during the Neogene. Bicolumnus ovatus n. gen., n. sp. is proposed in this paper. |
format |
Article in Journal/Newspaper |
author |
Wei, Wuchang Wise, Sherwood W |
author_facet |
Wei, Wuchang Wise, Sherwood W |
author_sort |
Wei, Wuchang |
title |
Middle Eocene to Pleistocene calcareous nannofossils of ODP Leg 113 holes, supplement to: Wei, Wuchang; Wise, Sherwood W (1990): Middle Eocene to Pleistocene calcareous nannofossils recovered by Ocean Drilling Program Leg 113 in the Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 639-666 |
title_short |
Middle Eocene to Pleistocene calcareous nannofossils of ODP Leg 113 holes, supplement to: Wei, Wuchang; Wise, Sherwood W (1990): Middle Eocene to Pleistocene calcareous nannofossils recovered by Ocean Drilling Program Leg 113 in the Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 639-666 |
title_full |
Middle Eocene to Pleistocene calcareous nannofossils of ODP Leg 113 holes, supplement to: Wei, Wuchang; Wise, Sherwood W (1990): Middle Eocene to Pleistocene calcareous nannofossils recovered by Ocean Drilling Program Leg 113 in the Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 639-666 |
title_fullStr |
Middle Eocene to Pleistocene calcareous nannofossils of ODP Leg 113 holes, supplement to: Wei, Wuchang; Wise, Sherwood W (1990): Middle Eocene to Pleistocene calcareous nannofossils recovered by Ocean Drilling Program Leg 113 in the Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 639-666 |
title_full_unstemmed |
Middle Eocene to Pleistocene calcareous nannofossils of ODP Leg 113 holes, supplement to: Wei, Wuchang; Wise, Sherwood W (1990): Middle Eocene to Pleistocene calcareous nannofossils recovered by Ocean Drilling Program Leg 113 in the Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 639-666 |
title_sort |
middle eocene to pleistocene calcareous nannofossils of odp leg 113 holes, supplement to: wei, wuchang; wise, sherwood w (1990): middle eocene to pleistocene calcareous nannofossils recovered by ocean drilling program leg 113 in the weddell sea. in: barker, pf; kennett, jp; et al. (eds.), proceedings of the ocean drilling program, scientific results, college station, tx (ocean drilling program), 113, 639-666 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1990 |
url |
https://dx.doi.org/10.1594/pangaea.746712 https://doi.pangaea.de/10.1594/PANGAEA.746712 |
long_lat |
ENVELOPE(-65.167,-65.167,-67.117,-67.117) ENVELOPE(3.000,3.000,-66.000,-66.000) |
geographic |
East Antarctica Kennett Maud Rise Weddell Weddell Sea West Antarctica |
geographic_facet |
East Antarctica Kennett Maud Rise Weddell Weddell Sea West Antarctica |
genre |
Antarc* Antarctica East Antarctica Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica Weddell Sea West Antarctica |
op_relation |
https://dx.doi.org/10.2973/odp.proc.sr.113.125.1990 |
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.746712 https://doi.org/10.2973/odp.proc.sr.113.125.1990 |
_version_ |
1766247320668602368 |