Browsing by Author "Bennett, Robbie"
Now showing 1 - 3 of 3
Results Per Page
- ItemIceshelf instability and the collapsing NW margin of the Laurentide Ice Sheet: core evidence from Viscount Melville Sound, Arctic Canada(2013) Furze, Mark F.A.; Pieńkowski, Anna J.; England, John H.; Esteves, Mariana da Silveira Ramos; Bennett, Robbie; Krywko, Jack; Glembiski, Danna; McLean, Brian; Blasco, SteveRecent work in the western Canadian Arctic Archipelago has seen a dramatic re-evaluation of the timing and extent of Late Wisconsinan glaciation by a primarily cold-based Laurentide Ice sheet. This has included the occupation by ice of formerly-considered ice free terrain and the extension of grounded ice from the main channels of the Northwest Passage, westwards onto the Beaufort Sea continental shelf. Nonetheless, while the pattern of ice extent and initial retreat is now well constrained, significant questions remain regarding the main phase of ice retreat southeastwards onto mainland Canada and the stability of the retreating margin in response to ameliorating climate and sea-level change.
- ItemThe marine signal of a collapsing ice margin: the catastrophic advance and collapse of the end Pleistocene Viscount Melville Sound Ice Shelf, Canadian Arctic Archipelago(2015) Furze, Mark F.A.; Pieńkowski, Anna J.; Nichols, Keir; Reedman, Amy; Esteves, Mariana da Silveira Ramos; Cage, Alix; Bennett, RobbieThis detailed study contributes towards an improved understanding of the constraints placed on the streaming of ice from M’Clintock Channel and the resulting draw-down and destabilization of the NW sector of the Laurentide Ice Sheet. Emerging foraminiferal, diatom, and biogeochemical data provide valuable insights into the deglacial and postglacial history of the western Northwest Passage.
- ItemThe shallow stratigraphy and geohazards of the northern Baffin Island shelf: studies to 2012(2013) Bennett, Robbie; Campbell, D. C.; Furze, Mark F.A.Preliminary resource assessments of the Baffin Bay–Lancaster Sound region suggest hydrocarbon resource potential similar to or greater than the Beaufort-Mackenzie (Harrison et al., 2011) and Jeanne d’Arc basins. Prior to determining if exploration will proceed in this frontier area, scientific understanding of regional geological constraints to exploration and development is essential. Collaboration between the Geological Survey of Canada (GSC) and the ArcticNet program (www.arcticnet.ulaval.ca) has resulted in the acquisition of multibeam echosounder and sub-bottom profiler data in northern Baffin Bay and Lancaster Sound since 2004. In 2008, the GSC and partners at the University of Quebec at Rimouski and the University of Quebec at Montreal completed a joint research cruise to northern Baffin Bay and Lancaster Sound, collecting seabed sediment samples and high resolution seismic reflection data. These new data have been used in conjunction with archived high-resolution seismic data collected by the GSC during the 1970’s and 1980’s in an effort to compile all the currently available information relating to the surficial geology, shallow stratigraphy and seabed geohazards of the northern Baffin Island shelf (see study area in Figure 1). Through this information compilation, data and knowledge gaps regarding seabed hazards will be recognized which will be used to make recommendations for future research.