Eocene-Oligocene nannofossils from the Labrador Sea
During Ocean Drilling Program (ODP) Leg 105, a thick sequence of lower Eocene to lower Oligocene sediments was recovered from Hole 647A in the southern Labrador Sea. These sediments contain diverse, well-preserved, high-latitude calcareous nannofossil flora. The nannofossil biostratigraphy of the ho...
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1989
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.745228 2023-05-15T17:06:06+02:00 Eocene-Oligocene nannofossils from the Labrador Sea Firth, John V MEDIAN LATITUDE: 53.468380 * MEDIAN LONGITUDE: -45.530400 * SOUTH-BOUND LATITUDE: 53.331300 * WEST-BOUND LONGITUDE: -46.604000 * NORTH-BOUND LATITUDE: 54.016700 * EAST-BOUND LONGITUDE: -45.262000 * DATE/TIME START: 1970-06-29T00:00:00 * DATE/TIME END: 1985-10-23T18:15:00 1989-09-14 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.745228 https://doi.org/10.1594/PANGAEA.745228 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.745228 https://doi.org/10.1594/PANGAEA.745228 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Firth, John V (1989): Eocene and Oligocene calcareous nannofossils from the Labrador Sea, ODP Leg 105. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 263-286, https://doi.org/10.2973/odp.proc.sr.105.131.1989 105-647A 12-112 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg105 Leg12 North Atlantic North Atlantic Ocean Ocean Drilling Program ODP Dataset 1989 ftpangaea https://doi.org/10.1594/PANGAEA.745228 https://doi.org/10.2973/odp.proc.sr.105.131.1989 2023-01-20T07:31:53Z During Ocean Drilling Program (ODP) Leg 105, a thick sequence of lower Eocene to lower Oligocene sediments was recovered from Hole 647A in the southern Labrador Sea. These sediments contain diverse, well-preserved, high-latitude calcareous nannofossil flora. The nannofossil biostratigraphy of the hole indicates the presence of a minor hiatus between Zones NP 16 and NP 17 in the upper middle Eocene and a barren interval separating Zones NP 13 and NP 15. Species abundance is highest within the lower to middle Eocene and starts to decline near the base of the upper Eocene. No major change in the nannoflora was observed across the Eocene/Oligocene boundary, although a slight decrease in species abundance was recorded. The Paleogene calcareous nannofossils of nearby DSDP Site 112 were reexamined and compared with those of Site 647. Several cores were reassigned to different nannofossil zones. The calcareous nannoflora are dominated by high-latitude indicative species and also exhibit a high diversity, which suggests the influence of more temperate water masses in this region during Eocene and Oligocene time. One new subspecies from the middle Eocene, Sphenolithus furcatolithoides labradorensis, is described. Dataset Labrador Sea North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-46.604000,-45.262000,54.016700,53.331300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
105-647A 12-112 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg105 Leg12 North Atlantic North Atlantic Ocean Ocean Drilling Program ODP |
spellingShingle |
105-647A 12-112 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg105 Leg12 North Atlantic North Atlantic Ocean Ocean Drilling Program ODP Firth, John V Eocene-Oligocene nannofossils from the Labrador Sea |
topic_facet |
105-647A 12-112 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg105 Leg12 North Atlantic North Atlantic Ocean Ocean Drilling Program ODP |
description |
During Ocean Drilling Program (ODP) Leg 105, a thick sequence of lower Eocene to lower Oligocene sediments was recovered from Hole 647A in the southern Labrador Sea. These sediments contain diverse, well-preserved, high-latitude calcareous nannofossil flora. The nannofossil biostratigraphy of the hole indicates the presence of a minor hiatus between Zones NP 16 and NP 17 in the upper middle Eocene and a barren interval separating Zones NP 13 and NP 15. Species abundance is highest within the lower to middle Eocene and starts to decline near the base of the upper Eocene. No major change in the nannoflora was observed across the Eocene/Oligocene boundary, although a slight decrease in species abundance was recorded. The Paleogene calcareous nannofossils of nearby DSDP Site 112 were reexamined and compared with those of Site 647. Several cores were reassigned to different nannofossil zones. The calcareous nannoflora are dominated by high-latitude indicative species and also exhibit a high diversity, which suggests the influence of more temperate water masses in this region during Eocene and Oligocene time. One new subspecies from the middle Eocene, Sphenolithus furcatolithoides labradorensis, is described. |
format |
Dataset |
author |
Firth, John V |
author_facet |
Firth, John V |
author_sort |
Firth, John V |
title |
Eocene-Oligocene nannofossils from the Labrador Sea |
title_short |
Eocene-Oligocene nannofossils from the Labrador Sea |
title_full |
Eocene-Oligocene nannofossils from the Labrador Sea |
title_fullStr |
Eocene-Oligocene nannofossils from the Labrador Sea |
title_full_unstemmed |
Eocene-Oligocene nannofossils from the Labrador Sea |
title_sort |
eocene-oligocene nannofossils from the labrador sea |
publisher |
PANGAEA |
publishDate |
1989 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.745228 https://doi.org/10.1594/PANGAEA.745228 |
op_coverage |
MEDIAN LATITUDE: 53.468380 * MEDIAN LONGITUDE: -45.530400 * SOUTH-BOUND LATITUDE: 53.331300 * WEST-BOUND LONGITUDE: -46.604000 * NORTH-BOUND LATITUDE: 54.016700 * EAST-BOUND LONGITUDE: -45.262000 * DATE/TIME START: 1970-06-29T00:00:00 * DATE/TIME END: 1985-10-23T18:15:00 |
long_lat |
ENVELOPE(-46.604000,-45.262000,54.016700,53.331300) |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_source |
Supplement to: Firth, John V (1989): Eocene and Oligocene calcareous nannofossils from the Labrador Sea, ODP Leg 105. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 263-286, https://doi.org/10.2973/odp.proc.sr.105.131.1989 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.745228 https://doi.org/10.1594/PANGAEA.745228 |
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.745228 https://doi.org/10.2973/odp.proc.sr.105.131.1989 |
_version_ |
1766061086467948544 |