Paleocene to middle Eocene calcareous nannofossils of Maude Rise, Weddell Sea
Cores from Sites 689 and 690 of Ocean Drilling Program Leg 113 provide the most continuous Paleocene and Eocene sequence yet recovered by deep sea drilling in the high latitudes of the Southern Ocean. The nannofossil-foraminifer oozes and chalks recovered from Maud Rise at 65°S in the Weddell Sea pr...
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1990
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.753320 2023-05-15T18:21:16+02:00 Paleocene to middle Eocene calcareous nannofossils of Maude Rise, Weddell Sea Pospichal, James J Wise, Sherwood W MEDIAN LATITUDE: -64.903200 * MEDIAN LONGITUDE: 1.962880 * SOUTH-BOUND LATITUDE: -65.161000 * WEST-BOUND LONGITUDE: 1.204800 * NORTH-BOUND LATITUDE: -64.517000 * EAST-BOUND LONGITUDE: 3.099900 * DATE/TIME START: 1987-01-16T08:00:00 * DATE/TIME END: 1987-01-23T20:30:00 1990-11-11 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.753320 https://doi.org/10.1594/PANGAEA.753320 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.753320 https://doi.org/10.1594/PANGAEA.753320 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Pospichal, James J; Wise, Sherwood W (1990): Paleocene to middle Eocene calcareous nannofossils of ODP Sites 689 and 690, Maud Rise, 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, 613-638, https://doi.org/10.2973/odp.proc.sr.113.205.1990 113-689B 113-690 113-690B 113-690C COMPCORE Composite Core DRILL Drilling/drill rig Joides Resolution Leg113 Ocean Drilling Program ODP South Atlantic Ocean Dataset 1990 ftpangaea https://doi.org/10.1594/PANGAEA.753320 https://doi.org/10.2973/odp.proc.sr.113.205.1990 2023-01-20T07:31:58Z Cores from Sites 689 and 690 of Ocean Drilling Program Leg 113 provide the most continuous Paleocene and Eocene sequence yet recovered by deep sea drilling in the high latitudes of the Southern Ocean. The nannofossil-foraminifer oozes and chalks recovered from Maud Rise at 65°S in the Weddell Sea provide a unique opportunity for biostratigraphic study of extremely high southern latitude carbonate sediments. The presence of warm water index fossils such as the discoasters and species of the Tribrachiatus plexus facilitate the application of commonly used low latitude calcareous nannofossil biostratigraphic zonation schemes for the upper Paleocene and lower Eocene intervals. In the more complete section at Site 690, Okada and Bukry Zones CP1 through CP10 can be identified for the most part with the possible exception of Zone CP3. Several hiatuses are present in the sequence at Site 689 with the most notable being at the Cretaceous/Tertiary and Paleocene/Eocene boundaries. Though not extremely diverse, the assemblage of discoasters in the upper Paleocene and lower Eocene calcareous oozes is indicative of warm, relatively equable climates during that interval. A peak in discoaster diversity in uppermost Paleocene sediments (Zone CP8) corresponds to a negative shift in 5180 values. Associated coccolith assemblages are quite characteristic of high latitudes with abundant Chiasmolithus, Prinsius, and Toweius. Climatic cooling is indicated for middle Eocene sediments by assemblages that contain very abundant Reticulofenestra, lack common discoasters and sphenoliths and are much less diverse overall. Two new taxa are described, Biscutum? neocoronum n. sp. and Amithalithina sigmundii n. gen., n. sp. Dataset South Atlantic Ocean Southern Ocean Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Maud Rise ENVELOPE(3.000,3.000,-66.000,-66.000) Maude ENVELOPE(168.417,168.417,-83.150,-83.150) Southern Ocean Weddell Weddell Sea ENVELOPE(1.204800,3.099900,-64.517000,-65.161000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
113-689B 113-690 113-690B 113-690C COMPCORE Composite Core DRILL Drilling/drill rig Joides Resolution Leg113 Ocean Drilling Program ODP South Atlantic Ocean |
spellingShingle |
113-689B 113-690 113-690B 113-690C COMPCORE Composite Core DRILL Drilling/drill rig Joides Resolution Leg113 Ocean Drilling Program ODP South Atlantic Ocean Pospichal, James J Wise, Sherwood W Paleocene to middle Eocene calcareous nannofossils of Maude Rise, Weddell Sea |
topic_facet |
113-689B 113-690 113-690B 113-690C COMPCORE Composite Core DRILL Drilling/drill rig Joides Resolution Leg113 Ocean Drilling Program ODP South Atlantic Ocean |
description |
Cores from Sites 689 and 690 of Ocean Drilling Program Leg 113 provide the most continuous Paleocene and Eocene sequence yet recovered by deep sea drilling in the high latitudes of the Southern Ocean. The nannofossil-foraminifer oozes and chalks recovered from Maud Rise at 65°S in the Weddell Sea provide a unique opportunity for biostratigraphic study of extremely high southern latitude carbonate sediments. The presence of warm water index fossils such as the discoasters and species of the Tribrachiatus plexus facilitate the application of commonly used low latitude calcareous nannofossil biostratigraphic zonation schemes for the upper Paleocene and lower Eocene intervals. In the more complete section at Site 690, Okada and Bukry Zones CP1 through CP10 can be identified for the most part with the possible exception of Zone CP3. Several hiatuses are present in the sequence at Site 689 with the most notable being at the Cretaceous/Tertiary and Paleocene/Eocene boundaries. Though not extremely diverse, the assemblage of discoasters in the upper Paleocene and lower Eocene calcareous oozes is indicative of warm, relatively equable climates during that interval. A peak in discoaster diversity in uppermost Paleocene sediments (Zone CP8) corresponds to a negative shift in 5180 values. Associated coccolith assemblages are quite characteristic of high latitudes with abundant Chiasmolithus, Prinsius, and Toweius. Climatic cooling is indicated for middle Eocene sediments by assemblages that contain very abundant Reticulofenestra, lack common discoasters and sphenoliths and are much less diverse overall. Two new taxa are described, Biscutum? neocoronum n. sp. and Amithalithina sigmundii n. gen., n. sp. |
format |
Dataset |
author |
Pospichal, James J Wise, Sherwood W |
author_facet |
Pospichal, James J Wise, Sherwood W |
author_sort |
Pospichal, James J |
title |
Paleocene to middle Eocene calcareous nannofossils of Maude Rise, Weddell Sea |
title_short |
Paleocene to middle Eocene calcareous nannofossils of Maude Rise, Weddell Sea |
title_full |
Paleocene to middle Eocene calcareous nannofossils of Maude Rise, Weddell Sea |
title_fullStr |
Paleocene to middle Eocene calcareous nannofossils of Maude Rise, Weddell Sea |
title_full_unstemmed |
Paleocene to middle Eocene calcareous nannofossils of Maude Rise, Weddell Sea |
title_sort |
paleocene to middle eocene calcareous nannofossils of maude rise, weddell sea |
publisher |
PANGAEA |
publishDate |
1990 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.753320 https://doi.org/10.1594/PANGAEA.753320 |
op_coverage |
MEDIAN LATITUDE: -64.903200 * MEDIAN LONGITUDE: 1.962880 * SOUTH-BOUND LATITUDE: -65.161000 * WEST-BOUND LONGITUDE: 1.204800 * NORTH-BOUND LATITUDE: -64.517000 * EAST-BOUND LONGITUDE: 3.099900 * DATE/TIME START: 1987-01-16T08:00:00 * DATE/TIME END: 1987-01-23T20:30:00 |
long_lat |
ENVELOPE(3.000,3.000,-66.000,-66.000) ENVELOPE(168.417,168.417,-83.150,-83.150) ENVELOPE(1.204800,3.099900,-64.517000,-65.161000) |
geographic |
Maud Rise Maude Southern Ocean Weddell Weddell Sea |
geographic_facet |
Maud Rise Maude Southern Ocean Weddell Weddell Sea |
genre |
South Atlantic Ocean Southern Ocean Weddell Sea |
genre_facet |
South Atlantic Ocean Southern Ocean Weddell Sea |
op_source |
Supplement to: Pospichal, James J; Wise, Sherwood W (1990): Paleocene to middle Eocene calcareous nannofossils of ODP Sites 689 and 690, Maud Rise, 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, 613-638, https://doi.org/10.2973/odp.proc.sr.113.205.1990 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.753320 https://doi.org/10.1594/PANGAEA.753320 |
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.753320 https://doi.org/10.2973/odp.proc.sr.113.205.1990 |
_version_ |
1766200442461618176 |