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TitleContexte paléoenvironnemental d'un lac à troncs subfossiles
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorRodrigue, G; Francus, P; Fortin, D
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. 116-120, 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
AreaComplexe La Grande
Lat/Long WENS -72.6500 -72.6167 54.4333 54.4000
Subjectsenvironmental geology; hydrogeology; paleontology; surficial geology/geomorphology; soils science; geochronology; geochemistry; stratigraphy; geophysics; Nature and Environment; Science and Technology; paleoenvironment; climatology; paleoclimatology; hydrologic environment; dendrochronology; surface waters; lakes; lake sediment cores; lake sediment geochemistry; fossils; fossil plants; sedimentation rates; radiometric dating; radiocarbon dating; limnology; soils; bathymetry; geophysical logging; Le projet ARCHIVES; lacustrine littoral sediments; Climate change; Hydrology; Boreal ecosystems; Forests; Trees; Forest fires; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; photomicrographs; profiles; time series; geoscientific sketch maps; geophysical logs; geophysical images
ProgramClimate Change Geoscience Extreme Events
Released2021 06 28
AbstractThis research specifies the palaeoenvironmental context (mainly the occurrence of fires and the rate of sedimentation) of a lake containing an important deposit of subfossil trunks used to develop a millennial dendroclimatic reconstruction within the framework of the ARCHIVES project (Chapter 18). Charred ericaceous macroremains in the soils of the riparian forest at site L18 have been dated with radiocarbon and corroborate the fire history reconstructed from the recruitment sequences of subfossils in the lacustrine littoral zone over the past millennium. Geochemical analyzes show that sediment inputs to the lake and limnological conditions have not changed significantly during this period. Consequently, although the fires influenced the regularity of the supply of subfossil trunks, they did not influence their conditions of conservation in water.

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