Diatom abundances in ODP Leg 114 holes
The practically continuous, paleomagnetically dated late Gauss-Brunhes sediment profiles of ODP Sites 699 and 701, south of the present Polar Front Zone (PFZ), and Site 704, north of the present PFZ, are used for a high-resolution study of abundance fluctuations of eight stratigraphic marker species...
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PANGAEA
1991
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.754589 https://doi.org/10.1594/PANGAEA.754589 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.754589 2023-05-15T13:42:10+02:00 Diatom abundances in ODP Leg 114 holes Fenner, Juliane M MEDIAN LATITUDE: -50.468833 * MEDIAN LONGITUDE: -15.489350 * SOUTH-BOUND LATITUDE: -52.985000 * WEST-BOUND LONGITUDE: -30.677000 * NORTH-BOUND LATITUDE: -46.879000 * EAST-BOUND LONGITUDE: 7.420800 * DATE/TIME START: 1987-03-20T10:45:00 * DATE/TIME END: 1987-05-03T10:14:00 1991-12-01 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.754589 https://doi.org/10.1594/PANGAEA.754589 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.754589 https://doi.org/10.1594/PANGAEA.754589 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Fenner, Juliane M (1991): Late Pliocene - Quaternary quantitative diatom stratigraphy in the atlantic sector of the Southern Ocean. In: Ciesielski, PF; Kristoffersen, Y; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 114, 97-121, https://doi.org/10.2973/odp.proc.sr.114.133.1991 114-699A 114-701C 114-704A 114-704B DRILL Drilling/drill rig Joides Resolution Leg114 Ocean Drilling Program ODP South Atlantic Ocean Dataset 1991 ftpangaea https://doi.org/10.1594/PANGAEA.754589 https://doi.org/10.2973/odp.proc.sr.114.133.1991 2023-01-20T07:31:59Z The practically continuous, paleomagnetically dated late Gauss-Brunhes sediment profiles of ODP Sites 699 and 701, south of the present Polar Front Zone (PFZ), and Site 704, north of the present PFZ, are used for a high-resolution study of abundance fluctuations of eight stratigraphic marker species in space and time. Ecological restrictions and preferences of the diatom species Hemidiscus karstenii, Actinocyclus ingens f. planus, Thalassiosira elliptipora, Thalassiosira kolbei, Thalassiosira vulnifica, Simonseniella barboi, Cosmiodiscus insignis, and Nitzschia weaveri are deduced. The ages of their first abundant appearance datums (FAAD), last-appearance datums (LAD), and last abundant appearance datums (LAAD) at the three sites are determined. The interpolated datum ages agree relatively well with those determined by other authors, if one interprets most of their LADs as LAADs. FAADs and LAADs produce more accurate datums than LADs. For the late Matuyama (younger than approximately 2.0 Ma), when PFZ fluctuations effected all three site sites, the datum ages determined agree within the methodically caused limits of accuracy for each datum. For the early Matuyama (older than approximately 2.0 Ma) the results can be interpreted as either that the ages of the FAAD of T. kolbei and LAAD of T. vulnifica datums determined at Sites 699 and 701 are more reliable or that these datums are diachronous between these two sites and Site 704. Such a diachroneity could be caused by different paleoceanographic conditions (stable subantarctic conditions over Site 704 and stable antarctic conditions over Sites 699 and 701). A few taxonomic changes were necessary. One new genus is defined (Simonseniella gen. nov.) and five new combinations are proposed: Simonseniella barboi (Brun) comb, nov., Simonseniella praebarboi (Schrader) comb, nov., Simonseniella curvirostris (Jousé) comb, nov., Thalassiosira elliptipora (Donahue) comb, nov., and Thalassiosira vulnifica (Gombos) comb. nov. Dataset Antarc* Antarctic South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic ENVELOPE(-30.677000,7.420800,-46.879000,-52.985000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
114-699A 114-701C 114-704A 114-704B DRILL Drilling/drill rig Joides Resolution Leg114 Ocean Drilling Program ODP South Atlantic Ocean |
spellingShingle |
114-699A 114-701C 114-704A 114-704B DRILL Drilling/drill rig Joides Resolution Leg114 Ocean Drilling Program ODP South Atlantic Ocean Fenner, Juliane M Diatom abundances in ODP Leg 114 holes |
topic_facet |
114-699A 114-701C 114-704A 114-704B DRILL Drilling/drill rig Joides Resolution Leg114 Ocean Drilling Program ODP South Atlantic Ocean |
description |
The practically continuous, paleomagnetically dated late Gauss-Brunhes sediment profiles of ODP Sites 699 and 701, south of the present Polar Front Zone (PFZ), and Site 704, north of the present PFZ, are used for a high-resolution study of abundance fluctuations of eight stratigraphic marker species in space and time. Ecological restrictions and preferences of the diatom species Hemidiscus karstenii, Actinocyclus ingens f. planus, Thalassiosira elliptipora, Thalassiosira kolbei, Thalassiosira vulnifica, Simonseniella barboi, Cosmiodiscus insignis, and Nitzschia weaveri are deduced. The ages of their first abundant appearance datums (FAAD), last-appearance datums (LAD), and last abundant appearance datums (LAAD) at the three sites are determined. The interpolated datum ages agree relatively well with those determined by other authors, if one interprets most of their LADs as LAADs. FAADs and LAADs produce more accurate datums than LADs. For the late Matuyama (younger than approximately 2.0 Ma), when PFZ fluctuations effected all three site sites, the datum ages determined agree within the methodically caused limits of accuracy for each datum. For the early Matuyama (older than approximately 2.0 Ma) the results can be interpreted as either that the ages of the FAAD of T. kolbei and LAAD of T. vulnifica datums determined at Sites 699 and 701 are more reliable or that these datums are diachronous between these two sites and Site 704. Such a diachroneity could be caused by different paleoceanographic conditions (stable subantarctic conditions over Site 704 and stable antarctic conditions over Sites 699 and 701). A few taxonomic changes were necessary. One new genus is defined (Simonseniella gen. nov.) and five new combinations are proposed: Simonseniella barboi (Brun) comb, nov., Simonseniella praebarboi (Schrader) comb, nov., Simonseniella curvirostris (Jousé) comb, nov., Thalassiosira elliptipora (Donahue) comb, nov., and Thalassiosira vulnifica (Gombos) comb. nov. |
format |
Dataset |
author |
Fenner, Juliane M |
author_facet |
Fenner, Juliane M |
author_sort |
Fenner, Juliane M |
title |
Diatom abundances in ODP Leg 114 holes |
title_short |
Diatom abundances in ODP Leg 114 holes |
title_full |
Diatom abundances in ODP Leg 114 holes |
title_fullStr |
Diatom abundances in ODP Leg 114 holes |
title_full_unstemmed |
Diatom abundances in ODP Leg 114 holes |
title_sort |
diatom abundances in odp leg 114 holes |
publisher |
PANGAEA |
publishDate |
1991 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.754589 https://doi.org/10.1594/PANGAEA.754589 |
op_coverage |
MEDIAN LATITUDE: -50.468833 * MEDIAN LONGITUDE: -15.489350 * SOUTH-BOUND LATITUDE: -52.985000 * WEST-BOUND LONGITUDE: -30.677000 * NORTH-BOUND LATITUDE: -46.879000 * EAST-BOUND LONGITUDE: 7.420800 * DATE/TIME START: 1987-03-20T10:45:00 * DATE/TIME END: 1987-05-03T10:14:00 |
long_lat |
ENVELOPE(-30.677000,7.420800,-46.879000,-52.985000) |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic South Atlantic Ocean |
genre_facet |
Antarc* Antarctic South Atlantic Ocean |
op_source |
Supplement to: Fenner, Juliane M (1991): Late Pliocene - Quaternary quantitative diatom stratigraphy in the atlantic sector of the Southern Ocean. In: Ciesielski, PF; Kristoffersen, Y; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 114, 97-121, https://doi.org/10.2973/odp.proc.sr.114.133.1991 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.754589 https://doi.org/10.1594/PANGAEA.754589 |
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.754589 https://doi.org/10.2973/odp.proc.sr.114.133.1991 |
_version_ |
1766163927302930432 |