Late Cenozoic Climate History of the Ross Embayment from the AND-1B Drill Hole: Culmination of Three Decades of Antarctic Margin Drilling
Because of the paucity of exposed rock, the direct physical record of Antarctic Cenozoic glacial history has become known only recently and then largely from offshore shelf basins through seismic surveys and drilling. The number of holes on the continental shelf has been small and largely confined t...
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ftunivnebraskali:oai:digitalcommons.unl.edu:andrillrespub-1025 2023-11-12T04:05:28+01:00 Late Cenozoic Climate History of the Ross Embayment from the AND-1B Drill Hole: Culmination of Three Decades of Antarctic Margin Drilling Naish, T. R. Powell, R. D. Barrett, Peter J. Levy, R. H. Henrys, S. Wilson, G. S. Krissek, L. A. Niessen, F. Pompilio, M. Ross, J. Scherer, R. Talarico, F. Pyne, A. R. ANDRILL-MIS Science Team 2008-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/andrillrespub/26 https://digitalcommons.unl.edu/context/andrillrespub/article/1025/viewcontent/Naish_AAKCW_2008_Late_Cenozoic_climate.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/andrillrespub/26 https://digitalcommons.unl.edu/context/andrillrespub/article/1025/viewcontent/Naish_AAKCW_2008_Late_Cenozoic_climate.pdf ANDRILL Research and Publications Environmental Indicators and Impact Assessment text 2008 ftunivnebraskali 2023-10-30T10:48:50Z Because of the paucity of exposed rock, the direct physical record of Antarctic Cenozoic glacial history has become known only recently and then largely from offshore shelf basins through seismic surveys and drilling. The number of holes on the continental shelf has been small and largely confined to three areas (McMurdo Sound, Prydz Bay, and Antarctic Peninsula), but even in McMurdo Sound, where Oligocene and early Miocene strata are well cored, the late Cenozoic is poorly known and dated. The latest Antarctic geological drilling program, ANDRILL, successfully cored a 1285-m-long record of climate history spanning the last 13 m.y. from subsea-floor sediment beneath the McMurdo Ice Shelf (MIS), using drilling systems specially developed for operating through ice shelves. The cores provide the most complete Antarctic record to date of ice-sheet and climate fluctuations for this period of Earth’s history. The >60 cycles of advance and retreat of the grounded ice margin preserved in the AND-1B record the evolution of the Antarctic ice sheet since a profound global cooling step in deep-sea oxygen isotope records -14 m.y.a. A feature of particular interest is a -90-m-thick interval of diatomite deposited during the warm Pliocene and representing an extended period (-200,000 years) of locally open water, high phytoplankton productivity, and retreat of the glaciers on land. Text Antarc* Antarctic Antarctic Peninsula Ice Sheet Ice Shelf Ice Shelves McMurdo Ice Shelf McMurdo Sound Prydz Bay University of Nebraska-Lincoln: DigitalCommons@UNL Antarctic The Antarctic Antarctic Peninsula Prydz Bay McMurdo Sound McMurdo Ice Shelf ENVELOPE(166.500,166.500,-78.000,-78.000) |
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 Naish, T. R. Powell, R. D. Barrett, Peter J. Levy, R. H. Henrys, S. Wilson, G. S. Krissek, L. A. Niessen, F. Pompilio, M. Ross, J. Scherer, R. Talarico, F. Pyne, A. R. ANDRILL-MIS Science Team Late Cenozoic Climate History of the Ross Embayment from the AND-1B Drill Hole: Culmination of Three Decades of Antarctic Margin Drilling |
topic_facet |
Environmental Indicators and Impact Assessment |
description |
Because of the paucity of exposed rock, the direct physical record of Antarctic Cenozoic glacial history has become known only recently and then largely from offshore shelf basins through seismic surveys and drilling. The number of holes on the continental shelf has been small and largely confined to three areas (McMurdo Sound, Prydz Bay, and Antarctic Peninsula), but even in McMurdo Sound, where Oligocene and early Miocene strata are well cored, the late Cenozoic is poorly known and dated. The latest Antarctic geological drilling program, ANDRILL, successfully cored a 1285-m-long record of climate history spanning the last 13 m.y. from subsea-floor sediment beneath the McMurdo Ice Shelf (MIS), using drilling systems specially developed for operating through ice shelves. The cores provide the most complete Antarctic record to date of ice-sheet and climate fluctuations for this period of Earth’s history. The >60 cycles of advance and retreat of the grounded ice margin preserved in the AND-1B record the evolution of the Antarctic ice sheet since a profound global cooling step in deep-sea oxygen isotope records -14 m.y.a. A feature of particular interest is a -90-m-thick interval of diatomite deposited during the warm Pliocene and representing an extended period (-200,000 years) of locally open water, high phytoplankton productivity, and retreat of the glaciers on land. |
format |
Text |
author |
Naish, T. R. Powell, R. D. Barrett, Peter J. Levy, R. H. Henrys, S. Wilson, G. S. Krissek, L. A. Niessen, F. Pompilio, M. Ross, J. Scherer, R. Talarico, F. Pyne, A. R. ANDRILL-MIS Science Team |
author_facet |
Naish, T. R. Powell, R. D. Barrett, Peter J. Levy, R. H. Henrys, S. Wilson, G. S. Krissek, L. A. Niessen, F. Pompilio, M. Ross, J. Scherer, R. Talarico, F. Pyne, A. R. ANDRILL-MIS Science Team |
author_sort |
Naish, T. R. |
title |
Late Cenozoic Climate History of the Ross Embayment from the AND-1B Drill Hole: Culmination of Three Decades of Antarctic Margin Drilling |
title_short |
Late Cenozoic Climate History of the Ross Embayment from the AND-1B Drill Hole: Culmination of Three Decades of Antarctic Margin Drilling |
title_full |
Late Cenozoic Climate History of the Ross Embayment from the AND-1B Drill Hole: Culmination of Three Decades of Antarctic Margin Drilling |
title_fullStr |
Late Cenozoic Climate History of the Ross Embayment from the AND-1B Drill Hole: Culmination of Three Decades of Antarctic Margin Drilling |
title_full_unstemmed |
Late Cenozoic Climate History of the Ross Embayment from the AND-1B Drill Hole: Culmination of Three Decades of Antarctic Margin Drilling |
title_sort |
late cenozoic climate history of the ross embayment from the and-1b drill hole: culmination of three decades of antarctic margin drilling |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2008 |
url |
https://digitalcommons.unl.edu/andrillrespub/26 https://digitalcommons.unl.edu/context/andrillrespub/article/1025/viewcontent/Naish_AAKCW_2008_Late_Cenozoic_climate.pdf |
long_lat |
ENVELOPE(166.500,166.500,-78.000,-78.000) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Prydz Bay McMurdo Sound McMurdo Ice Shelf |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Prydz Bay McMurdo Sound McMurdo Ice Shelf |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Ice Shelf Ice Shelves McMurdo Ice Shelf McMurdo Sound Prydz Bay |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Ice Shelf Ice Shelves McMurdo Ice Shelf McMurdo Sound Prydz Bay |
op_source |
ANDRILL Research and Publications |
op_relation |
https://digitalcommons.unl.edu/andrillrespub/26 https://digitalcommons.unl.edu/context/andrillrespub/article/1025/viewcontent/Naish_AAKCW_2008_Late_Cenozoic_climate.pdf |
_version_ |
1782342000555589632 |