Morphologic and stratigraphic evolution of the Antarctic Peninsula, Pacific margin
Rebesco et al. (1998) proposed a general depositional model that relates sediment drift evolution on the Antarctic Peninsula Pacific-margin continental rise to glacial processes on the continental shelf. In their model, terrigenous sediment was directly delivered to the rise and contributed to the c...
Main Author: | |
---|---|
Format: | Text |
Language: | unknown |
Published: |
LSU Scholarly Repository
2005
|
Subjects: | |
Online Access: | https://repository.lsu.edu/gradschool_theses/2753 https://doi.org/10.31390/gradschool_theses.2753 https://repository.lsu.edu/context/gradschool_theses/article/3752/viewcontent/uc.pdf |
id |
ftlouisianastuir:oai:repository.lsu.edu:gradschool_theses-3752 |
---|---|
record_format |
openpolar |
spelling |
ftlouisianastuir:oai:repository.lsu.edu:gradschool_theses-3752 2024-09-15T17:45:26+00:00 Morphologic and stratigraphic evolution of the Antarctic Peninsula, Pacific margin Holloman, Jason Henry 2005-01-01T08:00:00Z application/pdf https://repository.lsu.edu/gradschool_theses/2753 https://doi.org/10.31390/gradschool_theses.2753 https://repository.lsu.edu/context/gradschool_theses/article/3752/viewcontent/uc.pdf unknown LSU Scholarly Repository https://repository.lsu.edu/gradschool_theses/2753 doi:10.31390/gradschool_theses.2753 https://repository.lsu.edu/context/gradschool_theses/article/3752/viewcontent/uc.pdf LSU Master's Theses antarctic peninsula marine geology Earth Sciences text 2005 ftlouisianastuir https://doi.org/10.31390/gradschool_theses.2753 2024-08-08T04:27:17Z Rebesco et al. (1998) proposed a general depositional model that relates sediment drift evolution on the Antarctic Peninsula Pacific-margin continental rise to glacial processes on the continental shelf. In their model, terrigenous sediment was directly delivered to the rise and contributed to the construction of large sediment drifts when grounded ice extended to the shelf edge. In this scenario, large volumes of fluidized sediment by-passed the margin at the mouth of ice streams (i.e., fast flowing ice), whereas prograding slopes were constructed on those portions of the shelf margin between major ice streams. This model relies heavily on the modern geomorphology of the margin. In contrast, an evaluation of the subsurface stratigraphy suggested that there may have been significant lateral shifts of ice-stream locations and associated trough-mouth-fan depositional systems through time (Bart and Anderson, 1995). New seismic data was acquired along the strike of the Antarctic Peninsula shelf during the 2002 season aboard the NBP R/VIB. Detailed mapping and regional correlations confirm that slope progradation between the modern troughs was indeed associated with large ice streams. Moreover, the new mapping results presented here illustrate that the last several glacial cycles did not produce significant slope progradation anywhere along the margin. This signifies a major change in the stratal-stacking pattern on the outer continental shelf. Correlation with age control at ODP Leg 178 shelf sites 1097 and 1103 indicates that the shift from progradation to aggradation occurred at ~5 Ma (Pliocene). Text Antarc* Antarctic Antarctic Peninsula LSU Digital Commons (Louisiana State University) |
institution |
Open Polar |
collection |
LSU Digital Commons (Louisiana State University) |
op_collection_id |
ftlouisianastuir |
language |
unknown |
topic |
antarctic peninsula marine geology Earth Sciences |
spellingShingle |
antarctic peninsula marine geology Earth Sciences Holloman, Jason Henry Morphologic and stratigraphic evolution of the Antarctic Peninsula, Pacific margin |
topic_facet |
antarctic peninsula marine geology Earth Sciences |
description |
Rebesco et al. (1998) proposed a general depositional model that relates sediment drift evolution on the Antarctic Peninsula Pacific-margin continental rise to glacial processes on the continental shelf. In their model, terrigenous sediment was directly delivered to the rise and contributed to the construction of large sediment drifts when grounded ice extended to the shelf edge. In this scenario, large volumes of fluidized sediment by-passed the margin at the mouth of ice streams (i.e., fast flowing ice), whereas prograding slopes were constructed on those portions of the shelf margin between major ice streams. This model relies heavily on the modern geomorphology of the margin. In contrast, an evaluation of the subsurface stratigraphy suggested that there may have been significant lateral shifts of ice-stream locations and associated trough-mouth-fan depositional systems through time (Bart and Anderson, 1995). New seismic data was acquired along the strike of the Antarctic Peninsula shelf during the 2002 season aboard the NBP R/VIB. Detailed mapping and regional correlations confirm that slope progradation between the modern troughs was indeed associated with large ice streams. Moreover, the new mapping results presented here illustrate that the last several glacial cycles did not produce significant slope progradation anywhere along the margin. This signifies a major change in the stratal-stacking pattern on the outer continental shelf. Correlation with age control at ODP Leg 178 shelf sites 1097 and 1103 indicates that the shift from progradation to aggradation occurred at ~5 Ma (Pliocene). |
format |
Text |
author |
Holloman, Jason Henry |
author_facet |
Holloman, Jason Henry |
author_sort |
Holloman, Jason Henry |
title |
Morphologic and stratigraphic evolution of the Antarctic Peninsula, Pacific margin |
title_short |
Morphologic and stratigraphic evolution of the Antarctic Peninsula, Pacific margin |
title_full |
Morphologic and stratigraphic evolution of the Antarctic Peninsula, Pacific margin |
title_fullStr |
Morphologic and stratigraphic evolution of the Antarctic Peninsula, Pacific margin |
title_full_unstemmed |
Morphologic and stratigraphic evolution of the Antarctic Peninsula, Pacific margin |
title_sort |
morphologic and stratigraphic evolution of the antarctic peninsula, pacific margin |
publisher |
LSU Scholarly Repository |
publishDate |
2005 |
url |
https://repository.lsu.edu/gradschool_theses/2753 https://doi.org/10.31390/gradschool_theses.2753 https://repository.lsu.edu/context/gradschool_theses/article/3752/viewcontent/uc.pdf |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
LSU Master's Theses |
op_relation |
https://repository.lsu.edu/gradschool_theses/2753 doi:10.31390/gradschool_theses.2753 https://repository.lsu.edu/context/gradschool_theses/article/3752/viewcontent/uc.pdf |
op_doi |
https://doi.org/10.31390/gradschool_theses.2753 |
_version_ |
1810493265638588416 |