Evolution of the Antarctic glaciated continential margin
grantor: University of Toronto This thesis presents (a) a critical review of existing glacial marine depositional models for the Antarctic continental margin and (b) an analysis of data from Ocean Drilling Program Leg 178 (Feb.-April 1998) which drilled the Antarctic Peninsula continental margin. Pr...
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ftunivtoronto:oai:localhost:1807/14040 2023-05-15T14:04:18+02:00 Evolution of the Antarctic glaciated continential margin Januszczak, Nicole 2000 6402071 bytes application/pdf http://hdl.handle.net/1807/14040 http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0025/MQ50401.pdf en en_US eng http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0025/MQ50401.pdf http://hdl.handle.net/1807/14040 Thesis 2000 ftunivtoronto 2020-06-17T11:12:03Z grantor: University of Toronto This thesis presents (a) a critical review of existing glacial marine depositional models for the Antarctic continental margin and (b) an analysis of data from Ocean Drilling Program Leg 178 (Feb.-April 1998) which drilled the Antarctic Peninsula continental margin. Present-day 'interglacial' conditions of extensive ice shelves, servere cold, minimal meltwater production and sediment starvation on the margin are unique to Antarctica. Early work suggests such 'polar' conditions are representative of ancient Pleistocene and pre-Pleistocene environments in Antarctica. Litho- and biofacies data from Ocean Drilling Program Leg 178 provides important details regarding depositional processes responsible for glaciated continental shelf topsets and slope foresets in Antarctica. Topset deposits are constructed of deformation till reflecting large-scale subglacial reworking of pre-existing glacial and marine sediment across the shelf during ice sheet expansion and decay. Foreset deposits are composed of shelf deposits reworked downslope as debris flows and turbidity currents. Similar successions have been identified from other Pleistocene and pre-Pleistocene glacially-influenced continental margins. This work indicates that modern 'polar' conditions of Antarctica are not representative of ancient conditions. M.Sc. Thesis Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelves University of Toronto: Research Repository T-Space Antarctic The Antarctic Antarctic Peninsula |
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Open Polar |
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University of Toronto: Research Repository T-Space |
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ftunivtoronto |
language |
English |
description |
grantor: University of Toronto This thesis presents (a) a critical review of existing glacial marine depositional models for the Antarctic continental margin and (b) an analysis of data from Ocean Drilling Program Leg 178 (Feb.-April 1998) which drilled the Antarctic Peninsula continental margin. Present-day 'interglacial' conditions of extensive ice shelves, servere cold, minimal meltwater production and sediment starvation on the margin are unique to Antarctica. Early work suggests such 'polar' conditions are representative of ancient Pleistocene and pre-Pleistocene environments in Antarctica. Litho- and biofacies data from Ocean Drilling Program Leg 178 provides important details regarding depositional processes responsible for glaciated continental shelf topsets and slope foresets in Antarctica. Topset deposits are constructed of deformation till reflecting large-scale subglacial reworking of pre-existing glacial and marine sediment across the shelf during ice sheet expansion and decay. Foreset deposits are composed of shelf deposits reworked downslope as debris flows and turbidity currents. Similar successions have been identified from other Pleistocene and pre-Pleistocene glacially-influenced continental margins. This work indicates that modern 'polar' conditions of Antarctica are not representative of ancient conditions. M.Sc. |
format |
Thesis |
author |
Januszczak, Nicole |
spellingShingle |
Januszczak, Nicole Evolution of the Antarctic glaciated continential margin |
author_facet |
Januszczak, Nicole |
author_sort |
Januszczak, Nicole |
title |
Evolution of the Antarctic glaciated continential margin |
title_short |
Evolution of the Antarctic glaciated continential margin |
title_full |
Evolution of the Antarctic glaciated continential margin |
title_fullStr |
Evolution of the Antarctic glaciated continential margin |
title_full_unstemmed |
Evolution of the Antarctic glaciated continential margin |
title_sort |
evolution of the antarctic glaciated continential margin |
publishDate |
2000 |
url |
http://hdl.handle.net/1807/14040 http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0025/MQ50401.pdf |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelves |
op_relation |
http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0025/MQ50401.pdf http://hdl.handle.net/1807/14040 |
_version_ |
1766275338826940416 |