Image_2_Stratigraphic Occurrences of Sub-Polar Planktic Foraminifera in Pleistocene Sediments on the Lomonosov Ridge, Arctic Ocean.JPEG
Turborotalita quinqueloba is a species of planktic foraminifera commonly found in the sub-polar North Atlantic along the pathway of Atlantic waters in the Nordic seas and sometimes even in the Arctic Ocean, although its occurrence there remains poorly understood. Existing data show that T. quinquelo...
Main Authors: | , , , , , , , , |
---|---|
Format: | Still Image |
Language: | unknown |
Published: |
2019
|
Subjects: | |
Online Access: | https://doi.org/10.3389/feart.2019.00071.s002 https://figshare.com/articles/Image_2_Stratigraphic_Occurrences_of_Sub-Polar_Planktic_Foraminifera_in_Pleistocene_Sediments_on_the_Lomonosov_Ridge_Arctic_Ocean_JPEG/7969718 |
id |
ftfrontimediafig:oai:figshare.com:article/7969718 |
---|---|
record_format |
openpolar |
spelling |
ftfrontimediafig:oai:figshare.com:article/7969718 2023-05-15T14:51:13+02:00 Image_2_Stratigraphic Occurrences of Sub-Polar Planktic Foraminifera in Pleistocene Sediments on the Lomonosov Ridge, Arctic Ocean.JPEG Matt O’Regan Helen K. Coxall Thomas M. Cronin Richard Gyllencreutz Martin Jakobsson Stefanie Kaboth Ludvig Löwemark Steffen Wiers Gabriel West 2019-04-09T08:38:58Z https://doi.org/10.3389/feart.2019.00071.s002 https://figshare.com/articles/Image_2_Stratigraphic_Occurrences_of_Sub-Polar_Planktic_Foraminifera_in_Pleistocene_Sediments_on_the_Lomonosov_Ridge_Arctic_Ocean_JPEG/7969718 unknown doi:10.3389/feart.2019.00071.s002 https://figshare.com/articles/Image_2_Stratigraphic_Occurrences_of_Sub-Polar_Planktic_Foraminifera_in_Pleistocene_Sediments_on_the_Lomonosov_Ridge_Arctic_Ocean_JPEG/7969718 CC BY 4.0 CC-BY Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Arctic Ocean Lomonosov Ridge Pleistocene chronology lithostratigraphy planktonic foraminifera Turborotalita quinqueloba biostratigraphy Image Figure 2019 ftfrontimediafig https://doi.org/10.3389/feart.2019.00071.s002 2019-04-10T22:58:34Z Turborotalita quinqueloba is a species of planktic foraminifera commonly found in the sub-polar North Atlantic along the pathway of Atlantic waters in the Nordic seas and sometimes even in the Arctic Ocean, although its occurrence there remains poorly understood. Existing data show that T. quinqueloba is scarce in Holocene sediments from the central Arctic but abundance levels increase in sediments from the last interglacial period [Marine isotope stage (MIS) 5, 71–120 ka] in cores off the northern coast of Greenland and the southern Mendeleev Ridge. Turborotalita also occurs in earlier Pleistocene interglacials in these regions, with a unique and widespread occurrence of the less known Turborotalita egelida morphotype, proposed as a biostratigraphic marker for MIS 11 (474–374 ka). Here we present results from six new sediment cores, extending from the central to western Lomonosov Ridge, that show a consistent Pleistocene stratigraphy over 575 km. Preliminary semi-quantitative assessments of planktic foraminifer abundance and assemblage composition in two of these records (LOMROG12-7PC and AO16-5PC) reveal two distinct stratigraphic horizons containing Turborotalita in MIS 5. Earlier occurrences in Pleistocene interglacials are recognized, but contain significantly fewer specimens and do not appear to be stratigraphically coeval in the studied sequences. In all instances, the Turborotalita specimens resemble the typical T. quinqueloba morphotype but are smaller (63–125 μm), smooth-walled and lack the final thickened calcite layer common to adults of the species. These results extend the geographical range for T. quinqueloba in MIS 5 sediments of the Arctic Ocean and provide compelling evidence for recurrent invasions during Pleistocene interglacials. Still Image Arctic Arctic Ocean Climate change Foraminifera* Greenland Lomonosov Ridge Nordic Seas North Atlantic Planktonic foraminifera Frontiers: Figshare Arctic Arctic Ocean Greenland |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Arctic Ocean Lomonosov Ridge Pleistocene chronology lithostratigraphy planktonic foraminifera Turborotalita quinqueloba biostratigraphy |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Arctic Ocean Lomonosov Ridge Pleistocene chronology lithostratigraphy planktonic foraminifera Turborotalita quinqueloba biostratigraphy Matt O’Regan Helen K. Coxall Thomas M. Cronin Richard Gyllencreutz Martin Jakobsson Stefanie Kaboth Ludvig Löwemark Steffen Wiers Gabriel West Image_2_Stratigraphic Occurrences of Sub-Polar Planktic Foraminifera in Pleistocene Sediments on the Lomonosov Ridge, Arctic Ocean.JPEG |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Arctic Ocean Lomonosov Ridge Pleistocene chronology lithostratigraphy planktonic foraminifera Turborotalita quinqueloba biostratigraphy |
description |
Turborotalita quinqueloba is a species of planktic foraminifera commonly found in the sub-polar North Atlantic along the pathway of Atlantic waters in the Nordic seas and sometimes even in the Arctic Ocean, although its occurrence there remains poorly understood. Existing data show that T. quinqueloba is scarce in Holocene sediments from the central Arctic but abundance levels increase in sediments from the last interglacial period [Marine isotope stage (MIS) 5, 71–120 ka] in cores off the northern coast of Greenland and the southern Mendeleev Ridge. Turborotalita also occurs in earlier Pleistocene interglacials in these regions, with a unique and widespread occurrence of the less known Turborotalita egelida morphotype, proposed as a biostratigraphic marker for MIS 11 (474–374 ka). Here we present results from six new sediment cores, extending from the central to western Lomonosov Ridge, that show a consistent Pleistocene stratigraphy over 575 km. Preliminary semi-quantitative assessments of planktic foraminifer abundance and assemblage composition in two of these records (LOMROG12-7PC and AO16-5PC) reveal two distinct stratigraphic horizons containing Turborotalita in MIS 5. Earlier occurrences in Pleistocene interglacials are recognized, but contain significantly fewer specimens and do not appear to be stratigraphically coeval in the studied sequences. In all instances, the Turborotalita specimens resemble the typical T. quinqueloba morphotype but are smaller (63–125 μm), smooth-walled and lack the final thickened calcite layer common to adults of the species. These results extend the geographical range for T. quinqueloba in MIS 5 sediments of the Arctic Ocean and provide compelling evidence for recurrent invasions during Pleistocene interglacials. |
format |
Still Image |
author |
Matt O’Regan Helen K. Coxall Thomas M. Cronin Richard Gyllencreutz Martin Jakobsson Stefanie Kaboth Ludvig Löwemark Steffen Wiers Gabriel West |
author_facet |
Matt O’Regan Helen K. Coxall Thomas M. Cronin Richard Gyllencreutz Martin Jakobsson Stefanie Kaboth Ludvig Löwemark Steffen Wiers Gabriel West |
author_sort |
Matt O’Regan |
title |
Image_2_Stratigraphic Occurrences of Sub-Polar Planktic Foraminifera in Pleistocene Sediments on the Lomonosov Ridge, Arctic Ocean.JPEG |
title_short |
Image_2_Stratigraphic Occurrences of Sub-Polar Planktic Foraminifera in Pleistocene Sediments on the Lomonosov Ridge, Arctic Ocean.JPEG |
title_full |
Image_2_Stratigraphic Occurrences of Sub-Polar Planktic Foraminifera in Pleistocene Sediments on the Lomonosov Ridge, Arctic Ocean.JPEG |
title_fullStr |
Image_2_Stratigraphic Occurrences of Sub-Polar Planktic Foraminifera in Pleistocene Sediments on the Lomonosov Ridge, Arctic Ocean.JPEG |
title_full_unstemmed |
Image_2_Stratigraphic Occurrences of Sub-Polar Planktic Foraminifera in Pleistocene Sediments on the Lomonosov Ridge, Arctic Ocean.JPEG |
title_sort |
image_2_stratigraphic occurrences of sub-polar planktic foraminifera in pleistocene sediments on the lomonosov ridge, arctic ocean.jpeg |
publishDate |
2019 |
url |
https://doi.org/10.3389/feart.2019.00071.s002 https://figshare.com/articles/Image_2_Stratigraphic_Occurrences_of_Sub-Polar_Planktic_Foraminifera_in_Pleistocene_Sediments_on_the_Lomonosov_Ridge_Arctic_Ocean_JPEG/7969718 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Climate change Foraminifera* Greenland Lomonosov Ridge Nordic Seas North Atlantic Planktonic foraminifera |
genre_facet |
Arctic Arctic Ocean Climate change Foraminifera* Greenland Lomonosov Ridge Nordic Seas North Atlantic Planktonic foraminifera |
op_relation |
doi:10.3389/feart.2019.00071.s002 https://figshare.com/articles/Image_2_Stratigraphic_Occurrences_of_Sub-Polar_Planktic_Foraminifera_in_Pleistocene_Sediments_on_the_Lomonosov_Ridge_Arctic_Ocean_JPEG/7969718 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2019.00071.s002 |
_version_ |
1766322274777956352 |