Palaeontological Characterisation and Analysis of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica
The palaeontological yield of the 1138.54 metre-long AND-2A sedimentary rock core provides unique documentation of Neogene environments in the Ross Sea region of Antarctica. Especially important is the biological legacy of the climatically crucial ‘mild’ middle Miocene phase. Diatom-bearing units pr...
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2008
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ftunivnebraskali:oai:digitalcommons.unl.edu:andrillrespub-1040 2023-11-12T04:03:33+01:00 Palaeontological Characterisation and Analysis of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica Taviani, M. Hannah, M. Harwood, D. M. Ishman, S. E. Johnson, K. Olney, M. Riesselman, C. Tuzzi, E. Beu, A. G. Blair, S. Cantarelli, V. Ceregato, A. Corrado, S. Mohr, B. Nielson, S. H.H. Persico, D. Petrushak, S. Raine, J. I. Warny, S. ANDRILL-SMS Science Team 2008-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/andrillrespub/41 https://digitalcommons.unl.edu/context/andrillrespub/article/1040/viewcontent/Taviani_TA_2008_Palaeontological_characterisation.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/andrillrespub/41 https://digitalcommons.unl.edu/context/andrillrespub/article/1040/viewcontent/Taviani_TA_2008_Palaeontological_characterisation.pdf ANDRILL Research and Publications Environmental Indicators and Impact Assessment text 2008 ftunivnebraskali 2023-10-30T10:48:50Z The palaeontological yield of the 1138.54 metre-long AND-2A sedimentary rock core provides unique documentation of Neogene environments in the Ross Sea region of Antarctica. Especially important is the biological legacy of the climatically crucial ‘mild’ middle Miocene phase. Diatom-bearing units provide key information for stratigraphic intervals never previously recovered from locations proximal to the Antarctic continent and constrain the age model for the AND-2A core. Benthic calcareous (and agglutinated) foraminifera were present at many levels; remarkable is the occurrence of planktonic taxa only seldom found in the Neogene nearshore record of the Ross Sea region. The sporadic occurrence of calcareous dinoflagellate remains (thoracosphaerids) is consistent with warmer-than-present seawater during the Miocene. Marine palynomorphs are almost ubiquitous, although their abundance and diversity are variable. Pollen and spores from the middle Miocene section suggest a mossy tundra vegetation and represent the first stratigraphically-constrained record of terrestrial vegetation in Victoria Land during this time. Fragments of lignin-rich organic matter (huminite-vitrinite and inertinite groups) are particularly predominant during the Miocene climatic optimum, and continue into the Pliocene. Macrofossils are reasonably common throughout the core. Polychaete worm tubes were almost ubiquitous. Especially remarkable is the bivalve record (mainly pectinids), with 4-5 different taxa pointing out a mild climatic situation in the Miocene nearshore. Text Antarc* Antarctic Antarctica McMurdo Sound Ross Sea Tundra Victoria Land University of Nebraska-Lincoln: DigitalCommons@UNL Antarctic The Antarctic Ross Sea Victoria Land McMurdo Sound |
institution |
Open Polar |
collection |
University of Nebraska-Lincoln: DigitalCommons@UNL |
op_collection_id |
ftunivnebraskali |
language |
unknown |
topic |
Environmental Indicators and Impact Assessment |
spellingShingle |
Environmental Indicators and Impact Assessment Taviani, M. Hannah, M. Harwood, D. M. Ishman, S. E. Johnson, K. Olney, M. Riesselman, C. Tuzzi, E. Beu, A. G. Blair, S. Cantarelli, V. Ceregato, A. Corrado, S. Mohr, B. Nielson, S. H.H. Persico, D. Petrushak, S. Raine, J. I. Warny, S. ANDRILL-SMS Science Team Palaeontological Characterisation and Analysis of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
topic_facet |
Environmental Indicators and Impact Assessment |
description |
The palaeontological yield of the 1138.54 metre-long AND-2A sedimentary rock core provides unique documentation of Neogene environments in the Ross Sea region of Antarctica. Especially important is the biological legacy of the climatically crucial ‘mild’ middle Miocene phase. Diatom-bearing units provide key information for stratigraphic intervals never previously recovered from locations proximal to the Antarctic continent and constrain the age model for the AND-2A core. Benthic calcareous (and agglutinated) foraminifera were present at many levels; remarkable is the occurrence of planktonic taxa only seldom found in the Neogene nearshore record of the Ross Sea region. The sporadic occurrence of calcareous dinoflagellate remains (thoracosphaerids) is consistent with warmer-than-present seawater during the Miocene. Marine palynomorphs are almost ubiquitous, although their abundance and diversity are variable. Pollen and spores from the middle Miocene section suggest a mossy tundra vegetation and represent the first stratigraphically-constrained record of terrestrial vegetation in Victoria Land during this time. Fragments of lignin-rich organic matter (huminite-vitrinite and inertinite groups) are particularly predominant during the Miocene climatic optimum, and continue into the Pliocene. Macrofossils are reasonably common throughout the core. Polychaete worm tubes were almost ubiquitous. Especially remarkable is the bivalve record (mainly pectinids), with 4-5 different taxa pointing out a mild climatic situation in the Miocene nearshore. |
format |
Text |
author |
Taviani, M. Hannah, M. Harwood, D. M. Ishman, S. E. Johnson, K. Olney, M. Riesselman, C. Tuzzi, E. Beu, A. G. Blair, S. Cantarelli, V. Ceregato, A. Corrado, S. Mohr, B. Nielson, S. H.H. Persico, D. Petrushak, S. Raine, J. I. Warny, S. ANDRILL-SMS Science Team |
author_facet |
Taviani, M. Hannah, M. Harwood, D. M. Ishman, S. E. Johnson, K. Olney, M. Riesselman, C. Tuzzi, E. Beu, A. G. Blair, S. Cantarelli, V. Ceregato, A. Corrado, S. Mohr, B. Nielson, S. H.H. Persico, D. Petrushak, S. Raine, J. I. Warny, S. ANDRILL-SMS Science Team |
author_sort |
Taviani, M. |
title |
Palaeontological Characterisation and Analysis of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_short |
Palaeontological Characterisation and Analysis of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_full |
Palaeontological Characterisation and Analysis of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_fullStr |
Palaeontological Characterisation and Analysis of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_full_unstemmed |
Palaeontological Characterisation and Analysis of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica |
title_sort |
palaeontological characterisation and analysis of the and-2a core, andrill southern mcmurdo sound project, antarctica |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2008 |
url |
https://digitalcommons.unl.edu/andrillrespub/41 https://digitalcommons.unl.edu/context/andrillrespub/article/1040/viewcontent/Taviani_TA_2008_Palaeontological_characterisation.pdf |
geographic |
Antarctic The Antarctic Ross Sea Victoria Land McMurdo Sound |
geographic_facet |
Antarctic The Antarctic Ross Sea Victoria Land McMurdo Sound |
genre |
Antarc* Antarctic Antarctica McMurdo Sound Ross Sea Tundra Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Sound Ross Sea Tundra Victoria Land |
op_source |
ANDRILL Research and Publications |
op_relation |
https://digitalcommons.unl.edu/andrillrespub/41 https://digitalcommons.unl.edu/context/andrillrespub/article/1040/viewcontent/Taviani_TA_2008_Palaeontological_characterisation.pdf |
_version_ |
1782337835942019072 |