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Paraglacial terrace distribution and landscape morphometry in the Fraser Basin
Description: | This dataset relates to a publication in revision at Earth Surface Processes & Landforms entitled "Detection of paraglacial sediment supply using detrital 10Be in postglacial landscapes of south west British Columbia". The study uses spatial concentrations of cosmogenic radionuclides (CRNs) to identify sources of sediment in the Fraser River basin, utilizing the observation that CRN concentrations are distinct between glacially derived sediment (from past glacial periods), and sediment produced by contemporary denudation of exposed bedrock. Our observation suggest that despite the prevalence of paraglacial terrace fills in the lower Fraser River basin, glacially-derived sediment sourced from terrace fills only contributes ~15% to the modern Fraser River sediment load. The key datasets presented here are 1) an inventory of paraglacial terrace surfaces between Soda Creek and Lady Franklin Rock, that were identified from high-resolution LiDAR data using the methods of Clubb et al. (2017) (see Clubb, F.J., Mudd, S.M., Milodowski, D.T., Valters, D.A., Slater, L.J., Hurst, M.D. and Limaye, A.B., 2017. Geomorphometric delineation of floodplains and terraces from objectively defined topographic thresholds. Earth Surface Dynamics, 5(3), pp.369-385.), 2) a simplified regional bedrock geology map, 3) various topographic metrics that are used to compare against landscape denudation rate estimates, and 4) datasets used in the generation of CRN-derived denudation rate estimates across the Fraser River Basin. Final datasets included in "Detection of paraglacial sediment supply using detrital 10Be in postglacial landscapes of south west British Columbia" by Dingle et al. (in review). |
Notes: | The manuscript that cites this dataset is currently under review at Earth Surface Processes & Landforms |
Authors: | Dingle, Elizabeth H.; Durham University; ![]() Seagren, Erin; Simon Fraser University; ![]() Steelquist, Aaron; Simon Fraser University; Stanford University; ![]() Carr, Julia; Simon Fraser University; ![]() Larsen, Isaac; University of Massachusetts Amherst; ![]() Venditti, Jeremy; Simon Fraser University; ![]() |
Keywords: | Fraser River paraglacial terraces channel morphometry cosmogenic radionuclides |
Field of Research: | Earth and related environmental sciences > Environmental geoscience > Surface processes
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Publication Date: | 2025-01-13 |
Publisher: | Federated Research Data Repository / dépôt fédéré de données de recherche |
Funder: | British Columbia Salmon Restoration Innovation Fund; Landslide Impact on Flow Dynamics, Fish Migration and Genetics of Fraser River Salmon Natural Sciences and Engineering Research Council; Discovery Grant and Accelerator Supplement Natural Environment Research Council; NE/X017567/1 |
URI: | https://doi.org/10.20383/103.01166 |
Geographic Coverage: | Place Name Fraser River Basin Province / Province / Territory British Columbia Territory Country Canada |
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Access to this dataset is subject to the following terms:
Creative Commons Public Domain Dedication (CC0 1.0) https://creativecommons.org/publicdomain/zero/1.0/
Citation
Dingle, E., Seagren, E., Steelquist, A., Carr, J., Larsen, I., Venditti, J. (2025). Paraglacial terrace distribution and landscape morphometry in the Fraser Basin. Federated Research Data Repository. https://doi.org/10.20383/103.01166