Clast provenance and variability in MIS (AND-1B) core and their implications for the paleoclimatic evolution recorded in the Windless Bight - southern McMurdo Sound area (Antarctica)
Granule- to cobble-grade clasts in the uppermost 575 m of the MIS drill-core (AND-1B) highlight significant downcore modal and compositional variations, which provide direct information about the potential source regions and evidence of an evolving provenance, most likely as results of variable ice...
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2007
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ftunivnebraskali:oai:digitalcommons.unl.edu:andrillrespub-1001 2023-11-12T04:05:29+01:00 Clast provenance and variability in MIS (AND-1B) core and their implications for the paleoclimatic evolution recorded in the Windless Bight - southern McMurdo Sound area (Antarctica) Talarico, F. ANDRILL-MIS Science Team 2007-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/andrillrespub/2 https://digitalcommons.unl.edu/context/andrillrespub/article/1001/viewcontent/ANDRILL_AAKCW_2007_Clast_prevenance.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/andrillrespub/2 https://digitalcommons.unl.edu/context/andrillrespub/article/1001/viewcontent/ANDRILL_AAKCW_2007_Clast_prevenance.pdf ANDRILL Research and Publications Environmental Indicators and Impact Assessment text 2007 ftunivnebraskali 2023-10-30T10:48:35Z Granule- to cobble-grade clasts in the uppermost 575 m of the MIS drill-core (AND-1B) highlight significant downcore modal and compositional variations, which provide direct information about the potential source regions and evidence of an evolving provenance, most likely as results of variable ice conditions and ice-flow directions during the deposition of recovered diamictites. In addition to a significant contribution from the McMurdo Volcanic Group, the dataset indicates a compositionally varied clast assemblage including several basement rock types which are comparable to the main geological units exposed in the area SW of the drillsite, between the Skelton and Byrd Glaciers. Based on these provenance inferences and sedimentological constraints, the deposition of the diamictite units in the upper 575 m section recovered by the AND-1B drillcore would imply several oscillations of a grounded Ross Ice Shelf, possibly coupled with major phases of expansion of the West Antarctic Ice Sheet. Text Antarc* Antarctic Antarctica Ice Sheet Ice Shelf McMurdo Sound Ross Ice Shelf University of Nebraska-Lincoln: DigitalCommons@UNL Antarctic West Antarctic Ice Sheet McMurdo Sound Ross Ice Shelf Byrd Windless Bight ENVELOPE(167.667,167.667,-77.700,-77.700) |
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Open Polar |
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University of Nebraska-Lincoln: DigitalCommons@UNL |
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ftunivnebraskali |
language |
unknown |
topic |
Environmental Indicators and Impact Assessment |
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Environmental Indicators and Impact Assessment Talarico, F. ANDRILL-MIS Science Team Clast provenance and variability in MIS (AND-1B) core and their implications for the paleoclimatic evolution recorded in the Windless Bight - southern McMurdo Sound area (Antarctica) |
topic_facet |
Environmental Indicators and Impact Assessment |
description |
Granule- to cobble-grade clasts in the uppermost 575 m of the MIS drill-core (AND-1B) highlight significant downcore modal and compositional variations, which provide direct information about the potential source regions and evidence of an evolving provenance, most likely as results of variable ice conditions and ice-flow directions during the deposition of recovered diamictites. In addition to a significant contribution from the McMurdo Volcanic Group, the dataset indicates a compositionally varied clast assemblage including several basement rock types which are comparable to the main geological units exposed in the area SW of the drillsite, between the Skelton and Byrd Glaciers. Based on these provenance inferences and sedimentological constraints, the deposition of the diamictite units in the upper 575 m section recovered by the AND-1B drillcore would imply several oscillations of a grounded Ross Ice Shelf, possibly coupled with major phases of expansion of the West Antarctic Ice Sheet. |
format |
Text |
author |
Talarico, F. ANDRILL-MIS Science Team |
author_facet |
Talarico, F. ANDRILL-MIS Science Team |
author_sort |
Talarico, F. |
title |
Clast provenance and variability in MIS (AND-1B) core and their implications for the paleoclimatic evolution recorded in the Windless Bight - southern McMurdo Sound area (Antarctica) |
title_short |
Clast provenance and variability in MIS (AND-1B) core and their implications for the paleoclimatic evolution recorded in the Windless Bight - southern McMurdo Sound area (Antarctica) |
title_full |
Clast provenance and variability in MIS (AND-1B) core and their implications for the paleoclimatic evolution recorded in the Windless Bight - southern McMurdo Sound area (Antarctica) |
title_fullStr |
Clast provenance and variability in MIS (AND-1B) core and their implications for the paleoclimatic evolution recorded in the Windless Bight - southern McMurdo Sound area (Antarctica) |
title_full_unstemmed |
Clast provenance and variability in MIS (AND-1B) core and their implications for the paleoclimatic evolution recorded in the Windless Bight - southern McMurdo Sound area (Antarctica) |
title_sort |
clast provenance and variability in mis (and-1b) core and their implications for the paleoclimatic evolution recorded in the windless bight - southern mcmurdo sound area (antarctica) |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2007 |
url |
https://digitalcommons.unl.edu/andrillrespub/2 https://digitalcommons.unl.edu/context/andrillrespub/article/1001/viewcontent/ANDRILL_AAKCW_2007_Clast_prevenance.pdf |
long_lat |
ENVELOPE(167.667,167.667,-77.700,-77.700) |
geographic |
Antarctic West Antarctic Ice Sheet McMurdo Sound Ross Ice Shelf Byrd Windless Bight |
geographic_facet |
Antarctic West Antarctic Ice Sheet McMurdo Sound Ross Ice Shelf Byrd Windless Bight |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf McMurdo Sound Ross Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf McMurdo Sound Ross Ice Shelf |
op_source |
ANDRILL Research and Publications |
op_relation |
https://digitalcommons.unl.edu/andrillrespub/2 https://digitalcommons.unl.edu/context/andrillrespub/article/1001/viewcontent/ANDRILL_AAKCW_2007_Clast_prevenance.pdf |
_version_ |
1782342004957511680 |