Palynology analyses of Eocene to Oligocene sediments of DSDP Hole 38-338
Against the background of the profound global climatic shift from greenhouse to icehouse conditions during the Eocene–Oligocene transition, major geographic and oceanographic changes were taking place in the Norwegian–Greenland Sea region. The Vøring Plateau was a prominent structural feature which...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.775321 2023-05-15T16:28:06+02:00 Palynology analyses of Eocene to Oligocene sediments of DSDP Hole 38-338 Eldrett, James S Harding, Ian C LATITUDE: 67.785200 * LONGITUDE: 5.387700 * DATE/TIME START: 1974-08-14T00:00:00 * DATE/TIME END: 1974-08-14T00:00:00 2009-02-03 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.775321 https://doi.org/10.1594/PANGAEA.775321 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.775321 https://doi.org/10.1594/PANGAEA.775321 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Eldrett, James S; Harding, Ian C (2009): Palynological analyses of Eocene to Oligocene sediments from DSDP Site 338, Outer Vøring Plateau. Marine Micropaleontology, 73(3-4), 226-240, https://doi.org/10.1016/j.marmicro.2009.10.004 38-338 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg38 North Atlantic/Norwegian Sea/PLATEAU Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.775321 https://doi.org/10.1016/j.marmicro.2009.10.004 2023-01-20T07:32:24Z Against the background of the profound global climatic shift from greenhouse to icehouse conditions during the Eocene–Oligocene transition, major geographic and oceanographic changes were taking place in the Norwegian–Greenland Sea region. The Vøring Plateau was a prominent structural feature which influenced the evolution of water mass circulation in the Nordic seas, and we present detailed palaeoenvironmental reconstructions of this structure. New palynological results suggest that shallow water inner-neritic environments were developed across parts of the Vøring Plateau during early Eocene times, with terrestrial and brackish water palynomorphs indicating that both basement highs to the north, and the crestal part of the Vøring Escarpment, may have been emergent. A transition from marginal-marine to open marine conditions occurred around 44 Ma ago, with the complete subsidence of the Vøring Plateau below sea level, facilitating inter-basinal surface water circulation and promoted a significant increase in photic zone fertility. Carbon sequestration associated with such enhanced productivity in the late Eocene Nordic seas may have contributed to declining Cenozoic atmospheric carbon dioxide levels, thence to declining global temperatures and the development of limited Northern Hemisphere continental ice on Greenland in the latest Eocene. Dataset Greenland Greenland Sea Nordic Seas North Atlantic Norwegian Sea PANGAEA - Data Publisher for Earth & Environmental Science Norwegian Sea Greenland Vøring Plateau ENVELOPE(4.000,4.000,67.000,67.000) ENVELOPE(5.387700,5.387700,67.785200,67.785200) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
38-338 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg38 North Atlantic/Norwegian Sea/PLATEAU |
spellingShingle |
38-338 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg38 North Atlantic/Norwegian Sea/PLATEAU Eldrett, James S Harding, Ian C Palynology analyses of Eocene to Oligocene sediments of DSDP Hole 38-338 |
topic_facet |
38-338 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg38 North Atlantic/Norwegian Sea/PLATEAU |
description |
Against the background of the profound global climatic shift from greenhouse to icehouse conditions during the Eocene–Oligocene transition, major geographic and oceanographic changes were taking place in the Norwegian–Greenland Sea region. The Vøring Plateau was a prominent structural feature which influenced the evolution of water mass circulation in the Nordic seas, and we present detailed palaeoenvironmental reconstructions of this structure. New palynological results suggest that shallow water inner-neritic environments were developed across parts of the Vøring Plateau during early Eocene times, with terrestrial and brackish water palynomorphs indicating that both basement highs to the north, and the crestal part of the Vøring Escarpment, may have been emergent. A transition from marginal-marine to open marine conditions occurred around 44 Ma ago, with the complete subsidence of the Vøring Plateau below sea level, facilitating inter-basinal surface water circulation and promoted a significant increase in photic zone fertility. Carbon sequestration associated with such enhanced productivity in the late Eocene Nordic seas may have contributed to declining Cenozoic atmospheric carbon dioxide levels, thence to declining global temperatures and the development of limited Northern Hemisphere continental ice on Greenland in the latest Eocene. |
format |
Dataset |
author |
Eldrett, James S Harding, Ian C |
author_facet |
Eldrett, James S Harding, Ian C |
author_sort |
Eldrett, James S |
title |
Palynology analyses of Eocene to Oligocene sediments of DSDP Hole 38-338 |
title_short |
Palynology analyses of Eocene to Oligocene sediments of DSDP Hole 38-338 |
title_full |
Palynology analyses of Eocene to Oligocene sediments of DSDP Hole 38-338 |
title_fullStr |
Palynology analyses of Eocene to Oligocene sediments of DSDP Hole 38-338 |
title_full_unstemmed |
Palynology analyses of Eocene to Oligocene sediments of DSDP Hole 38-338 |
title_sort |
palynology analyses of eocene to oligocene sediments of dsdp hole 38-338 |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.775321 https://doi.org/10.1594/PANGAEA.775321 |
op_coverage |
LATITUDE: 67.785200 * LONGITUDE: 5.387700 * DATE/TIME START: 1974-08-14T00:00:00 * DATE/TIME END: 1974-08-14T00:00:00 |
long_lat |
ENVELOPE(4.000,4.000,67.000,67.000) ENVELOPE(5.387700,5.387700,67.785200,67.785200) |
geographic |
Norwegian Sea Greenland Vøring Plateau |
geographic_facet |
Norwegian Sea Greenland Vøring Plateau |
genre |
Greenland Greenland Sea Nordic Seas North Atlantic Norwegian Sea |
genre_facet |
Greenland Greenland Sea Nordic Seas North Atlantic Norwegian Sea |
op_source |
Supplement to: Eldrett, James S; Harding, Ian C (2009): Palynological analyses of Eocene to Oligocene sediments from DSDP Site 338, Outer Vøring Plateau. Marine Micropaleontology, 73(3-4), 226-240, https://doi.org/10.1016/j.marmicro.2009.10.004 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.775321 https://doi.org/10.1594/PANGAEA.775321 |
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.775321 https://doi.org/10.1016/j.marmicro.2009.10.004 |
_version_ |
1766017733870223360 |