| Title | Moat features, Amundsen Gulf, Canadian Arctic Archipelago |
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| Author | MacLean, B; Blasco, S; Bennett, R; Hughes Clarke, J; Patton, E |
| Source | Atlas of submarine glacial landforms: modern, Quaternary and ancient; by Dowdeswell, J A (ed.); Canals, M (ed.); Jakobsson, M (ed.); Todd, B J (ed.); Dowdeswell, E K (ed.); Hogan, K A (ed.) ; Geological Society of London;
Geological Society Memoir no. 46, 2016 p. 51-52, https://doi.org/10.1144/M46.85 |
| Image |  |
| Year | 2016 |
| Alt Series | Earth Sciences Sector, Contribution Series 20150068 |
| Publisher | Geological Society of London |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Northern offshore region |
| NTS | 97G/03; 97G/04; 97G/05; 97G/06 |
| Area | Amundsen Gulf |
| Lat/Long WENS | -125.6333 -125.5500 71.3167 71.2833 |
| Subjects | seafloor topography; ice movement; glacial landforms; drumlinoids; submarine ridges; submarine features |
| Illustrations | location maps; bathymetric profiles |
| Program | Public Safety
Geoscience Marine Geohazards |
| Released | 2016 11 30 |
| Abstract | Multibeam sonar imagery provides evidence of depositional and erosional seafloor features emplaced by a glacial ice stream that flowed through Amundsen Gulf into the Beaufort Sea during the last
glaciation. |
| Summary | (Plain Language Summary, not published)
Prominent seafloor bedforms in Amundsen Gulf include parallel mega-scale ridges and grooves that trend northwesterly across the region. Depressions up to
135 m wide and 45 m deep occur as interruptions in many of the ridges. The linear interruptions extend across adjoining ridges along trends that lie approximately normal to the trend of the ridges. Arcuate shaped depressions (moats) connect with
wider inter-ridge valleys trending to the northwest. These linear features are interpreted to have formed beneath a fast flowing glacial ice stream originating out of eastern Amundsen Gulf. The high seabed slope angles associated with these features
could pose a hazard to any future marine infrastructure in the area. |
| GEOSCAN ID | 296516 |
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