Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E)
Maintenance and Update Frequency: asNeeded Statement: Article written for publication in Marine Geology Purpose Article written for publication in Marine Geology The continental slope seaward of the Totten Glacier and Sabrina Coast displays a suite of submarine canyons separated by ridges. The ridge...
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ftands:oai:ands.org.au::2828661 2023-12-03T10:13:51+01:00 Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E) Spatial: westlimit=113; southlimit=-66.00; eastlimit=122; northlimit=-63.00 Temporal: From 2017-01-14 to 2017-03-05 https://researchdata.edu.au/continental-slope-rise-112e-122e/2828661 https://pid.geoscience.gov.au/dataset/ga/128487 unknown Australian Ocean Data Network https://researchdata.edu.au/continental-slope-rise-112e-122e/2828661 7f8eb61a-ca3e-49d7-84c5-84b8c5b54c77 https://pid.geoscience.gov.au/dataset/ga/128487 Commonwealth of Australia (Geoscience Australia) geoscientificInformation ENVIRONMENTAL SCIENCES EARTH SCIENCES Antarctica Continental slope and rise Totten Glacier Submarine cnayons Ridges Published_External publication ftands 2023-11-06T23:53:50Z Maintenance and Update Frequency: asNeeded Statement: Article written for publication in Marine Geology Purpose Article written for publication in Marine Geology The continental slope seaward of the Totten Glacier and Sabrina Coast displays a suite of submarine canyons separated by ridges. The ridges show a range of morphological features that indicate they form by accretion of pelagic and hemipelagic sediment which can be remobilised by mass movement. The study area can be divided into two areas with distinct geomorphological features. Canyons in the eastern part of the study area have concave thalwegs and are linked to the shelf edge and upper slope and show signs of erosion and deposition along their beds suggesting cycles of activity controlled by climate cycles. The major canyon in the western part of the area has a convex thalweg. It is likely fed predominantly by mass movement from the flanks of the adjacent ridges with less input sediment from the shelf edge. The ridges between canyons in the Eastern part of the study area are asymmetric with crests close to the west bank of adjacent canyons and are mostly formed by westward advection of fine sediment lofted from turbidity currents and deposition of pelagic sediment. The ridges in the western part of the study area are more likely fully contourites, formed by accretion of suspended sediment with their associated canyons fed by flows derived predominantly from slumping on the adjacent ridge flanks. Canyons and ridges in the eastern part of the study area lie to the east of the Totten Glacier and are seaward of small ice drainage basins feeding the Moscow University Ice Shelf. Ridges and canyons in the western part of area formed from sediment transported along the margin and from detritus originating from the Totten Glacier. Higher sediment supply produced larger, shallower ridges that interact with ocean currents and coincide with a long-lived depocenter. The overall geomorphology of the Sabrina Coast slope is part of a continuum of mixed ... Text Antarc* Antarctica East Antarctica Ice Shelf Moscow University Ice Shelf Totten Glacier Research Data Australia (Australian National Data Service - ANDS) East Antarctica Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) Sabrina Coast ENVELOPE(118.550,118.550,-67.000,-67.000) Moscow University Ice Shelf ENVELOPE(121.000,121.000,-67.000,-67.000) |
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Open Polar |
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Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
geoscientificInformation ENVIRONMENTAL SCIENCES EARTH SCIENCES Antarctica Continental slope and rise Totten Glacier Submarine cnayons Ridges Published_External |
spellingShingle |
geoscientificInformation ENVIRONMENTAL SCIENCES EARTH SCIENCES Antarctica Continental slope and rise Totten Glacier Submarine cnayons Ridges Published_External Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E) |
topic_facet |
geoscientificInformation ENVIRONMENTAL SCIENCES EARTH SCIENCES Antarctica Continental slope and rise Totten Glacier Submarine cnayons Ridges Published_External |
description |
Maintenance and Update Frequency: asNeeded Statement: Article written for publication in Marine Geology Purpose Article written for publication in Marine Geology The continental slope seaward of the Totten Glacier and Sabrina Coast displays a suite of submarine canyons separated by ridges. The ridges show a range of morphological features that indicate they form by accretion of pelagic and hemipelagic sediment which can be remobilised by mass movement. The study area can be divided into two areas with distinct geomorphological features. Canyons in the eastern part of the study area have concave thalwegs and are linked to the shelf edge and upper slope and show signs of erosion and deposition along their beds suggesting cycles of activity controlled by climate cycles. The major canyon in the western part of the area has a convex thalweg. It is likely fed predominantly by mass movement from the flanks of the adjacent ridges with less input sediment from the shelf edge. The ridges between canyons in the Eastern part of the study area are asymmetric with crests close to the west bank of adjacent canyons and are mostly formed by westward advection of fine sediment lofted from turbidity currents and deposition of pelagic sediment. The ridges in the western part of the study area are more likely fully contourites, formed by accretion of suspended sediment with their associated canyons fed by flows derived predominantly from slumping on the adjacent ridge flanks. Canyons and ridges in the eastern part of the study area lie to the east of the Totten Glacier and are seaward of small ice drainage basins feeding the Moscow University Ice Shelf. Ridges and canyons in the western part of area formed from sediment transported along the margin and from detritus originating from the Totten Glacier. Higher sediment supply produced larger, shallower ridges that interact with ocean currents and coincide with a long-lived depocenter. The overall geomorphology of the Sabrina Coast slope is part of a continuum of mixed ... |
format |
Text |
title |
Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E) |
title_short |
Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E) |
title_full |
Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E) |
title_fullStr |
Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E) |
title_full_unstemmed |
Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E) |
title_sort |
continental slope and rise geomorphology seaward of the totten glacier, east antarctica (112°e-122°e) |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/continental-slope-rise-112e-122e/2828661 https://pid.geoscience.gov.au/dataset/ga/128487 |
op_coverage |
Spatial: westlimit=113; southlimit=-66.00; eastlimit=122; northlimit=-63.00 Temporal: From 2017-01-14 to 2017-03-05 |
long_lat |
ENVELOPE(116.333,116.333,-66.833,-66.833) ENVELOPE(118.550,118.550,-67.000,-67.000) ENVELOPE(121.000,121.000,-67.000,-67.000) |
geographic |
East Antarctica Totten Glacier Sabrina Coast Moscow University Ice Shelf |
geographic_facet |
East Antarctica Totten Glacier Sabrina Coast Moscow University Ice Shelf |
genre |
Antarc* Antarctica East Antarctica Ice Shelf Moscow University Ice Shelf Totten Glacier |
genre_facet |
Antarc* Antarctica East Antarctica Ice Shelf Moscow University Ice Shelf Totten Glacier |
op_source |
Commonwealth of Australia (Geoscience Australia) |
op_relation |
https://researchdata.edu.au/continental-slope-rise-112e-122e/2828661 7f8eb61a-ca3e-49d7-84c5-84b8c5b54c77 https://pid.geoscience.gov.au/dataset/ga/128487 |
_version_ |
1784260803281551360 |