Crag-and-tail features on the Amundsen Sea continental shelf, West Antarctica

@article{Nitsche2016CragandtailFO,
  title={Crag-and-tail features on the Amundsen Sea continental shelf, West Antarctica},
  author={Frank O. Nitsche and Robert D. Larter and Karsten Gohl and Alastair G. C. Graham and Gerhard Kuhn},
  journal={memoirs},
  year={2016},
  volume={46},
  pages={199 - 200}
}
On parts of glaciated continental margins, especially the inner shelves around Antarctica, grounded ice has removed pre-existing sedimentary cover, leaving subglacial bedforms on eroded substrates (Anderson et al. 2001; Wellner et al. 2001). While the dominant subglacial bedforms often follow a distinct, relatively uniform pattern that can be related to overall trends in palaeo-ice flow and substrate geology (Wellner et al. 2006), others are more randomly distributed and may reflect local… Expand

Figures from this paper

The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction
Glacimarine processes affect about 20% of the global ocean today, and this area expanded considerably under cyclical full-glacial conditions during the Quaternary (Fig. 1) (Dowdeswell et al. 2016 bExpand
Revealing the former bed of Thwaites Glacier using sea-floor bathymetry
Abstract. The geometry of the sea floor beyond Thwaites Glacier (TG) is a major control on the routing of warm ocean waters towards the ice stream’s grounding zone, which has led to increased massExpand
Land glacier change driven by inter-decadal climate-ocean variability
Over the past 20 years satellite remote sensing has captured significant downwasting of glaciers that drain the West 10 Antarctic Ice Sheet into the ocean, particularly across the Amundsen SeaExpand
Glacial dynamics and deglacial retreat pattern in fingerdjupet trough, western barents sea
Abstract New high-resolution multibeam bathymetry and sub-bottom profile datasets from Fingerdjupet are used for the first detailed geomorphological mapping of the seafloor in this area. The mappedExpand
Relating bed character and subglacial morphology using seismic data from Thwaites Glacier, West Antarctica
Abstract Seismic measurements on Thwaites Glacier show a spatially variable bed character, with implications for ice-sheet stability. The West Antarctic Ice Sheet is losing mass rapidly throughExpand
Revealing the former bed of Thwaites Glacier using sea-floor bathymetry: implications for warm-water routing and bed controls on ice flow and buttressing
Abstract. The geometry of the sea floor immediately beyond Antarctica's marine-terminating glaciers is a fundamental control on warm-water routing, but it also describes former topographic pinningExpand
Glacier change along West Antarctica's Marie Byrd Land Sector and links to inter-decadal atmosphere–ocean variability
Abstract. Over the past 20 years satellite remote sensing has captured significant downwasting of glaciers that drain the West Antarctic Ice Sheet into the ocean, particularly across the Amundsen SeaExpand
Rapid geomorphological and sedimentological changes at a modern Alpine ice margin: lessons from the Gepatsch Glacier, Tirol, Austria
The Gepatsch Glacier in Tirol (Austria) is a rapidly retreating valley glacier whose host valley and forefield reveal subglacial, proglacial, and reworked sediment-landform assemblages. StructuresExpand
Response to Reviewers: tc-2020-25 by Kelly Hogan et al. “Revealing the former bed of Thwaites Glacier using sea-floor bathymetry” The comments of the two reviewers and the short comment are listed below with our responses below in blue italics
The geometry of the sea floor immediately beyond Antarctica's marine-terminating glaciers is a fundamental control on warm-water routing but it also describes former topographic pinning points thatExpand
Cumulated bibliography
  • memoirs
  • 2016
s, 39. Bennett, R., Forbes, D.L. et al. 2009. Cruise Report Amundsen 2006 – 804: Beaufort Sea/Amundsen Gulf/Northwest Passage, 22 August–30 October 2006. Geological Survey of Canada, OpenFile 6044,Expand

References

SHOWING 1-10 OF 11 REFERENCES
Bedform signature of a West Antarctic palaeo-ice stream reveals a multi-temporal record of flow and substrate control
Abstract The presence of a complex bedform arrangement on the sea floor of the continental shelf in the western Amundsen Sea Embayment, West Antarctica, indicates a multi-temporal record of flowExpand
Bathymetry of the Amundsen Sea continental shelf: Implications for geology, oceanography, and glaciology
The Amundsen Sea continental shelf is one of the most remote areas of coastal Antarctica and was relatively unexplored until the late 1980s. Over the last two decades, increased oceanographic andExpand
Distribution of glacial geomorphic features on the Antarctic continental shelf and correlation with substrate: implications for ice behavior
Surveys were conducted seaward of all the major drainage outlets of the Antarctic ice sheet from the Pennell Coast, north Victoria Land, to Marguerite Bay, Antarctic Peninsula. The results show thatExpand
Subglacial bedforms reveal complex basal regime in a zone of paleo-ice stream convergence, Amundsen Sea Embayment, West Antarctica
The flow of ice streams, which account for most discharge from large ice sheets, is controlled by processes operating at the ice stream bed. Data from modern ice stream beds are difficult to obtain,Expand
The death mask of the antarctic ice sheet: Comparison of glacial geomorphic features across the continental shelf
Abstract Multibeam swath bathymetry data, seismic lines, and shallow cores were collected seaward of all of the major drainage outlets of the Antarctic Ice Sheet from the Pennell Coast of NorthExpand
Footprint of the Expanded West Antarctic Ice Sheet: Ice Stream History and Behavior
Evaluating the stability of the West Antarctic Ice Sheet and its regulating role in global climate and eustasy hinges on our ability to understand the interaction of ice streams and the bed on whichExpand
Basement control on past ice sheet dynamics in the Amundsen Sea Embayment, West Antarctica
Abstract The development of landscapes and morphologies follows initially the tectonic displacement structures of the basement and sediments. Such fault zones or lineaments are often exploited byExpand
Glacial erosional landforms: origins and significance for palaeoglaciology
Glacial inversion modelling of continental-scale palaeo-ice sheets is now recognized as an important tool in palaeoglaciology. Existing palaeoglaciological reconstructions of the dimensions, geometryExpand
Erosion, Himalayan geodynamics, and the geomorphology of metamorphism
Is erosion important to the structural and petrological evolution of mountain belts? The nature of active metamorphic massifs colocated with deep gorges in the syntaxes at each end of the HimalayanExpand
West Antarctic Ice Sheet change since the last glacial period
The potential for rapid deglaciation, or collapse, of the 2–million–square–kilometer West Antarctic Ice Sheet (WAIS) in response to climate change is one of the most serious environmental threatsExpand
...
1
2
...