Dinoflagellate and other palynomorph abundance in sediments from ODP Leg 189 sites
At Ocean Drilling Program (ODP) Leg 189 Sites 1170-1172, the climatologically critical Eocene-Oligocene (E-O) transition is barren of any calcareous microfossils but contains rich marine organic walled dinoflagellate cyst (dinocyst) and diatom assemblages, suitable for detailed biostratigraphic and...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.779998 2023-05-15T13:42:10+02:00 Dinoflagellate and other palynomorph abundance in sediments from ODP Leg 189 sites Sluijs, Appy Brinkhuis, Henk Stickley, Catherine E Warnaar, Jeroen Williams, Graham L Fuller, Michael D MEDIAN LATITUDE: -46.536627 * MEDIAN LONGITUDE: 148.363333 * SOUTH-BOUND LATITUDE: -48.499950 * WEST-BOUND LONGITUDE: 146.049710 * NORTH-BOUND LATITUDE: -43.959750 * EAST-BOUND LONGITUDE: 149.928260 * DATE/TIME START: 2000-04-05T13:00:00 * DATE/TIME END: 2000-04-26T09:30:00 2003-04-25 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.779998 https://doi.org/10.1594/PANGAEA.779998 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.779998 https://doi.org/10.1594/PANGAEA.779998 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Sluijs, Appy; Brinkhuis, Henk; Stickley, Catherine E; Warnaar, Jeroen; Williams, Graham L; Fuller, Michael D (2003): Dinoflagellate cysts from the Eocene-Oligocene transition in the Southern Ocean: results from ODP Leg 189. In: Exon, NF; Kennett, JP; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 189, 1-42, https://doi.org/10.2973/odp.proc.sr.189.104.2003 189-1170D 189-1171D 189-1172A DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg189 Ocean Drilling Program ODP South Pacific Ocean Tasman Sea Dataset 2003 ftpangaea https://doi.org/10.1594/PANGAEA.779998 https://doi.org/10.2973/odp.proc.sr.189.104.2003 2023-01-20T07:32:30Z At Ocean Drilling Program (ODP) Leg 189 Sites 1170-1172, the climatologically critical Eocene-Oligocene (E-O) transition is barren of any calcareous microfossils but contains rich marine organic walled dinoflagellate cyst (dinocyst) and diatom assemblages, suitable for detailed biostratigraphic and paleoenvironmental analysis. The resulting first-ever integrated dinocyst/diatom magnetostratigraphy allows confident correlation of the E-O interval between all Leg 189 sites, including Site 1168. Our correlations indicate that the (deep) opening of the Tasmanian Gateway occurred quasi-synchronously throughout the Tasmanian region, starting at ~35.5 Ma. At Sites 1170-1172, quantitatively, three distinct dinocyst assemblages may be distinguished that reflect the relatively rapid and pronounced stepwise environmental changes associated with the E-O transition in the Tasmanian region, from a pro-deltaic setting to a deep marine pelagic setting. Moreover, synchronous with the deepening of the gateway, at the southern and eastern Sites 1170-1172, typical endemic Antarctic assemblages were replaced by more cosmopolitan dinocyst communities. In marked contrast, at Site 1168 off western Tasmania, endemic Antarctic taxa are virtually absent during the E-O transition. At Sites 1170-1172, the endemic Antarctic dinocyst assemblage (Transantarctic Flora) drastically changes into a more cosmopolitan assemblage at ~35.5 Ma, with a more offshore character, reflecting the arrival of different oceanographic and environmental conditions associated with the deepening of the Tasmanian Gateway. In turn, this assemblage grades at ~34 Ma into one more typical for even more offshore and/or upwelling conditions at Site 1172. In slightly younger deposits at all sites, organic microfossils are virtually absent, reflecting winnowing and oxidation, indicative of a next step of oceanographic development. This phase may be dated as close to the Oceanic Anoxic (Oi)-1 18O (Antarctic glaciation) event (~33.3 Ma). In a single productive sample from the ... Dataset Antarc* Antarctic PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Pacific Indian ENVELOPE(146.049710,149.928260,-43.959750,-48.499950) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
189-1170D 189-1171D 189-1172A DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg189 Ocean Drilling Program ODP South Pacific Ocean Tasman Sea |
spellingShingle |
189-1170D 189-1171D 189-1172A DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg189 Ocean Drilling Program ODP South Pacific Ocean Tasman Sea Sluijs, Appy Brinkhuis, Henk Stickley, Catherine E Warnaar, Jeroen Williams, Graham L Fuller, Michael D Dinoflagellate and other palynomorph abundance in sediments from ODP Leg 189 sites |
topic_facet |
189-1170D 189-1171D 189-1172A DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg189 Ocean Drilling Program ODP South Pacific Ocean Tasman Sea |
description |
At Ocean Drilling Program (ODP) Leg 189 Sites 1170-1172, the climatologically critical Eocene-Oligocene (E-O) transition is barren of any calcareous microfossils but contains rich marine organic walled dinoflagellate cyst (dinocyst) and diatom assemblages, suitable for detailed biostratigraphic and paleoenvironmental analysis. The resulting first-ever integrated dinocyst/diatom magnetostratigraphy allows confident correlation of the E-O interval between all Leg 189 sites, including Site 1168. Our correlations indicate that the (deep) opening of the Tasmanian Gateway occurred quasi-synchronously throughout the Tasmanian region, starting at ~35.5 Ma. At Sites 1170-1172, quantitatively, three distinct dinocyst assemblages may be distinguished that reflect the relatively rapid and pronounced stepwise environmental changes associated with the E-O transition in the Tasmanian region, from a pro-deltaic setting to a deep marine pelagic setting. Moreover, synchronous with the deepening of the gateway, at the southern and eastern Sites 1170-1172, typical endemic Antarctic assemblages were replaced by more cosmopolitan dinocyst communities. In marked contrast, at Site 1168 off western Tasmania, endemic Antarctic taxa are virtually absent during the E-O transition. At Sites 1170-1172, the endemic Antarctic dinocyst assemblage (Transantarctic Flora) drastically changes into a more cosmopolitan assemblage at ~35.5 Ma, with a more offshore character, reflecting the arrival of different oceanographic and environmental conditions associated with the deepening of the Tasmanian Gateway. In turn, this assemblage grades at ~34 Ma into one more typical for even more offshore and/or upwelling conditions at Site 1172. In slightly younger deposits at all sites, organic microfossils are virtually absent, reflecting winnowing and oxidation, indicative of a next step of oceanographic development. This phase may be dated as close to the Oceanic Anoxic (Oi)-1 18O (Antarctic glaciation) event (~33.3 Ma). In a single productive sample from the ... |
format |
Dataset |
author |
Sluijs, Appy Brinkhuis, Henk Stickley, Catherine E Warnaar, Jeroen Williams, Graham L Fuller, Michael D |
author_facet |
Sluijs, Appy Brinkhuis, Henk Stickley, Catherine E Warnaar, Jeroen Williams, Graham L Fuller, Michael D |
author_sort |
Sluijs, Appy |
title |
Dinoflagellate and other palynomorph abundance in sediments from ODP Leg 189 sites |
title_short |
Dinoflagellate and other palynomorph abundance in sediments from ODP Leg 189 sites |
title_full |
Dinoflagellate and other palynomorph abundance in sediments from ODP Leg 189 sites |
title_fullStr |
Dinoflagellate and other palynomorph abundance in sediments from ODP Leg 189 sites |
title_full_unstemmed |
Dinoflagellate and other palynomorph abundance in sediments from ODP Leg 189 sites |
title_sort |
dinoflagellate and other palynomorph abundance in sediments from odp leg 189 sites |
publisher |
PANGAEA |
publishDate |
2003 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.779998 https://doi.org/10.1594/PANGAEA.779998 |
op_coverage |
MEDIAN LATITUDE: -46.536627 * MEDIAN LONGITUDE: 148.363333 * SOUTH-BOUND LATITUDE: -48.499950 * WEST-BOUND LONGITUDE: 146.049710 * NORTH-BOUND LATITUDE: -43.959750 * EAST-BOUND LONGITUDE: 149.928260 * DATE/TIME START: 2000-04-05T13:00:00 * DATE/TIME END: 2000-04-26T09:30:00 |
long_lat |
ENVELOPE(146.049710,149.928260,-43.959750,-48.499950) |
geographic |
Antarctic Pacific Indian |
geographic_facet |
Antarctic Pacific Indian |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Supplement to: Sluijs, Appy; Brinkhuis, Henk; Stickley, Catherine E; Warnaar, Jeroen; Williams, Graham L; Fuller, Michael D (2003): Dinoflagellate cysts from the Eocene-Oligocene transition in the Southern Ocean: results from ODP Leg 189. In: Exon, NF; Kennett, JP; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 189, 1-42, https://doi.org/10.2973/odp.proc.sr.189.104.2003 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.779998 https://doi.org/10.1594/PANGAEA.779998 |
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.779998 https://doi.org/10.2973/odp.proc.sr.189.104.2003 |
_version_ |
1766164217395675136 |