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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; ORCID iD 0000-0003-0651-7337
Seagren, Erin; Simon Fraser University; ORCID iD 0000-0003-1996-9121
Steelquist, Aaron; Simon Fraser University; Stanford University; ORCID iD 0000-0003-3668-7521
Carr, Julia; Simon Fraser University; ORCID iD 0000-0002-2133-1525
Larsen, Isaac; University of Massachusetts Amherst; ORCID iD 0000-0003-3094-4830
Venditti, Jeremy; Simon Fraser University; ORCID iD 0000-0002-2876-4251
Keywords: Fraser River
paraglacial terraces
channel morphometry
cosmogenic radionuclides
Field of Research: 
Earth and related environmental sciences
>
Environmental geoscience
>
Surface processes
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