Diatom biostratigraphy of sediments from the Kerguelen Plateau, Southern Ocean
The biostratigraphic distribution and abundance of lower Oligocene to Pleistocene diatoms is documented from Holes 747A, 747B, 748B, 749B, and 751A drilled during Ocean Drilling Program Leg 120 on the Kerguelen Plateau in the southeast Indian Ocean. The occurrence of middle and upper Eocene diatoms...
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1992
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.728782 2024-09-15T17:48:01+00:00 Diatom biostratigraphy of sediments from the Kerguelen Plateau, Southern Ocean Harwood, David M Maruyama, Toshiaki MEDIAN LATITUDE: -57.041182 * MEDIAN LONGITUDE: 77.874082 * SOUTH-BOUND LATITUDE: -58.717000 * WEST-BOUND LONGITUDE: 76.407500 * NORTH-BOUND LATITUDE: -54.811000 * EAST-BOUND LONGITUDE: 79.814800 * DATE/TIME START: 1988-03-06T22:30:00 * DATE/TIME END: 1988-04-19T23:30:00 1992 application/zip, 11 datasets https://doi.pangaea.de/10.1594/PANGAEA.728782 https://doi.org/10.1594/PANGAEA.728782 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.728782 https://doi.org/10.1594/PANGAEA.728782 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Harwood, David M; Maruyama, Toshiaki (1992): Middle Eocene to Pleistocene diatom biostratigraphy of Southern Ocean sediments from the Kerguelen Plateau, Leg 120. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 683-733, https://doi.org/10.2973/odp.proc.sr.120.160.1992 120-747A 120-747B 120-748B 120-749B 120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean dataset publication series 1992 ftpangaea https://doi.org/10.1594/PANGAEA.72878210.2973/odp.proc.sr.120.160.1992 2024-07-24T02:31:20Z The biostratigraphic distribution and abundance of lower Oligocene to Pleistocene diatoms is documented from Holes 747A, 747B, 748B, 749B, and 751A drilled during Ocean Drilling Program Leg 120 on the Kerguelen Plateau in the southeast Indian Ocean. The occurrence of middle and upper Eocene diatoms is also documented, but these are rare and occur in discrete intervals. The recovery of several Oligocene to Pleistocene sections with minimal coring gaps, relatively good magnetostratigraphic signatures, and mixed assemblages of both calcareous and siliceous microfossils makes the above four Leg 120 sites important biostratigraphic reference sections for the Southern Ocean and Antarctic continent. A high-resolution diatom zonation divides the last 36 m.y. into 45 zones and subzones. This zonation is built upon an existing biostratigraphic framework developed over the past 20 yr of Southern Ocean/Antarctic deep-sea coring and drilling. After the recent advances from diatom biostratigraphic studies on sediments from Legs 113, 114, 119, and 120, a zonal framework for the Southern Ocean is beginning to stabilize. The potential age resolution afforded by the high-diversity diatom assemblages in this region ranks among the highest of all fossil groups. In addition to the 46 datum levels that define the diatom zones and subzones, the approximate stratigraphic level, age, and magnetic anomaly correlative of more than 150 other diatom datums are determined or estimated. These total 73 datum levels for the Pliocene-Pleistocene, 67 for the Miocene, and 45 for the Oligocene. Greater stratigraphic resolution is possible as the less common and poorly documented species become better known. This high-resolution diatom stratigraphy, combined with good to moderately good magnetostratigraphic control, led to the recognition of more than 10 intervals where hiatuses dissect the Oligocene-Pleistocene section on the Kerguelen Plateau. We propose 12 new diatom taxa and 6 new combination Other/Unknown Material Antarc* Antarctic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(76.407500,79.814800,-54.811000,-58.717000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
120-747A 120-747B 120-748B 120-749B 120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean |
spellingShingle |
120-747A 120-747B 120-748B 120-749B 120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean Harwood, David M Maruyama, Toshiaki Diatom biostratigraphy of sediments from the Kerguelen Plateau, Southern Ocean |
topic_facet |
120-747A 120-747B 120-748B 120-749B 120-751A DRILL Drilling/drill rig Joides Resolution Leg120 Ocean Drilling Program ODP South Indian Ridge South Indian Ocean |
description |
The biostratigraphic distribution and abundance of lower Oligocene to Pleistocene diatoms is documented from Holes 747A, 747B, 748B, 749B, and 751A drilled during Ocean Drilling Program Leg 120 on the Kerguelen Plateau in the southeast Indian Ocean. The occurrence of middle and upper Eocene diatoms is also documented, but these are rare and occur in discrete intervals. The recovery of several Oligocene to Pleistocene sections with minimal coring gaps, relatively good magnetostratigraphic signatures, and mixed assemblages of both calcareous and siliceous microfossils makes the above four Leg 120 sites important biostratigraphic reference sections for the Southern Ocean and Antarctic continent. A high-resolution diatom zonation divides the last 36 m.y. into 45 zones and subzones. This zonation is built upon an existing biostratigraphic framework developed over the past 20 yr of Southern Ocean/Antarctic deep-sea coring and drilling. After the recent advances from diatom biostratigraphic studies on sediments from Legs 113, 114, 119, and 120, a zonal framework for the Southern Ocean is beginning to stabilize. The potential age resolution afforded by the high-diversity diatom assemblages in this region ranks among the highest of all fossil groups. In addition to the 46 datum levels that define the diatom zones and subzones, the approximate stratigraphic level, age, and magnetic anomaly correlative of more than 150 other diatom datums are determined or estimated. These total 73 datum levels for the Pliocene-Pleistocene, 67 for the Miocene, and 45 for the Oligocene. Greater stratigraphic resolution is possible as the less common and poorly documented species become better known. This high-resolution diatom stratigraphy, combined with good to moderately good magnetostratigraphic control, led to the recognition of more than 10 intervals where hiatuses dissect the Oligocene-Pleistocene section on the Kerguelen Plateau. We propose 12 new diatom taxa and 6 new combination |
format |
Other/Unknown Material |
author |
Harwood, David M Maruyama, Toshiaki |
author_facet |
Harwood, David M Maruyama, Toshiaki |
author_sort |
Harwood, David M |
title |
Diatom biostratigraphy of sediments from the Kerguelen Plateau, Southern Ocean |
title_short |
Diatom biostratigraphy of sediments from the Kerguelen Plateau, Southern Ocean |
title_full |
Diatom biostratigraphy of sediments from the Kerguelen Plateau, Southern Ocean |
title_fullStr |
Diatom biostratigraphy of sediments from the Kerguelen Plateau, Southern Ocean |
title_full_unstemmed |
Diatom biostratigraphy of sediments from the Kerguelen Plateau, Southern Ocean |
title_sort |
diatom biostratigraphy of sediments from the kerguelen plateau, southern ocean |
publisher |
PANGAEA |
publishDate |
1992 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.728782 https://doi.org/10.1594/PANGAEA.728782 |
op_coverage |
MEDIAN LATITUDE: -57.041182 * MEDIAN LONGITUDE: 77.874082 * SOUTH-BOUND LATITUDE: -58.717000 * WEST-BOUND LONGITUDE: 76.407500 * NORTH-BOUND LATITUDE: -54.811000 * EAST-BOUND LONGITUDE: 79.814800 * DATE/TIME START: 1988-03-06T22:30:00 * DATE/TIME END: 1988-04-19T23:30:00 |
long_lat |
ENVELOPE(76.407500,79.814800,-54.811000,-58.717000) |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Supplement to: Harwood, David M; Maruyama, Toshiaki (1992): Middle Eocene to Pleistocene diatom biostratigraphy of Southern Ocean sediments from the Kerguelen Plateau, Leg 120. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 683-733, https://doi.org/10.2973/odp.proc.sr.120.160.1992 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.728782 https://doi.org/10.1594/PANGAEA.728782 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.72878210.2973/odp.proc.sr.120.160.1992 |
_version_ |
1810288684290801664 |