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dc.contributor.authorWagner, Kaleb
dc.date.accessioned2015-02-24T14:38:56Z
dc.date.available2015-02-24T14:38:56Z
dc.date.issued2015-02-24
dc.identifier.urihttp://hdl.handle.net/10464/6096
dc.description.abstractTransverse, subglacial bedforms (ribbed moraines) occur frequently in southern Keewatin, Nunavut, Canada, where they record a complex glacial history, including shifting centers of ice dispersal and fluctuating basal thermal regimes. Comprehensive mapping and quantitative morphometric analysis of the subglacial bedform archive in this sector reveals that ribbed moraines are spatially clustered by size and assume a broad range of visually distinct forms. Results suggest that end-member morphologies are consistent with a dichotomous polygenetic origin, and that a continuum of forms emerged through subsequent reshaping processes of variable intensity and duration. Translocation of mobile, immobile and quasi-mobile beds throughout the last glacial cycle conditioned the development of a subglacial deforming bed mosaic, and is likely responsible for the patchy zonation of palimpsest and inherited landscape signatures within this former core region of the Laurentide Ice Sheet. Comparison against field evidence collected from central Norway suggests that bedforming processes can be locally mediated by pre-existing topography.en_US
dc.language.isoengen_US
dc.publisherBrock Universityen_US
dc.subjectribbed morainesen_US
dc.subjectsubglacial bedformsen_US
dc.subjectspatial analysisen_US
dc.subjectKeewatinen_US
dc.subjectdeforming bed mosaicen_US
dc.titleRibbed moraines and subglacial geomorphological signatures of interior-sector palaeo-ice sheet dynamicsen_US
dc.typeElectronic Thesis or Dissertationen
dc.degree.nameM.Sc. Earth Sciencesen_US
dc.degree.levelMastersen_US
dc.contributor.departmentDepartment of Earth Sciencesen_US
dc.degree.disciplineFaculty of Mathematics and Scienceen_US
dc.embargo.termsNoneen_US
refterms.dateFOA2021-08-04T03:32:33Z


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