GEOSCAN Search Results: Fastlink


TitleLes archives paléo-hydrologiques de Grand Lake, Labrador
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorFortin, D; Francus, P
SourceUtilisation des archives naturelles pour la reconstitution du passé hydro-climatique; by Bégin, C; Nicault, A; Bégin, Y; Geological Survey of Canada, Open File 8768, 2021 p. 188-193, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Utilisation des archives naturelles pour la reconstitution du passé hydro-climatique
File formatpdf
ProvinceNewfoundland and Labrador
NTS13F/07; 13F/08; 13F/09; 13F/10
AreaGrand Lake; Labrador; Sheshatshiu; North West River
Lat/Long WENS -61.0000 -60.0000 53.7500 53.2500
Subjectsenvironmental geology; hydrogeology; surficial geology/geomorphology; stratigraphy; Nature and Environment; Science and Technology; surface waters; lakes; lake sediment cores; lake sediment thickness; varves; laminations; climatology; paleoclimatology; hydrologic environment; runoff; paleoenvironment; floods; snow; Le projet ARCHIVES; lacustrine sediments; Climate change; Hydrology; Boreal ecosystems; Forests; Trees; Phanerozoic; Cenozoic; Quaternary
Illustrationsphotographs; time series
ProgramClimate Change Geoscience Extreme Events
Released2021 06 28
AbstractSediments accumulated at the bottom of Grand Lake, located near the communities of North West River and the Innu First Nation of Sheshatshiu, Labrador, constitute an exceptional paleo-environmental archive. Their thin annual layers (varves) were analyzed in a manner similar to the annual growth rings of trees. The varves are formed due to the great depth of the lake (> 200 meters) and the large quantity of fine particles carried by its main tributary during flood periods. Analysis of sediments collected from various locations on the lake-bottom indicates that the varve thickness has declined over the past 150 years and that the interannual variability of floods has also decreased considerably during this period. We attribute these changes to a decrease in snow cover and in the intensity of the spring melt during the study period.

Date modified: