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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
101

Géomorphologie et stratigraphie Quaternaire de systèmes de fjords-lacustres du Québec-Labrador

Trottier, Annie-Pier 28 April 2021 (has links)
Les sédiments contenus dans les fjords offrent un excellent potentiel de reconstitution paléoenvironnementale, et ce, à haute résolution, puisque ces anciennes vallées glaciaires généralement situées à la confluence du domaine continental et marin sont caractérisées par de hauts taux de sédimentation. Les fjords sont formés de longues vallées étroites et profondes ayant été modelées à plusieurs reprises au cours de cycles glaciaires et interglaciaires. Ils contiennent typiquement des dépôts et formes de terrain qui témoignent des variations des anciennes marges glaciaires. Certains fjords peuvent aussi appartenir au domaine lacustre, et ce, en milieux alpins ou en périphérie d'anciennes zones recouvertes par un glacier où les vallées ont été ennoyées par les eaux de fonte et/ou les eaux marines, mais que le relèvement glacio-isostatique combiné à la régression marine postglaciaire les a émergés et isolés. Plusieurs fjords-lacustres sont présents au Québec et au Labrador, mais leur évolution depuis la dernière glaciation reste peu documentée puisque la plupart de leurs analogues lacustres dans d'autres régions du monde ont encore aujourd'hui des langues glaciaires dans leur bassin versant, ou sont situés en milieux alpin où aucune transgression marine n'a jamais eu lieu. Une approche combinant les technologies hydro-acoustiques telle que la bathymétrie multifaisceaux et les profils de sous-surface permet de visualiser à haute résolution la morpho-stratigraphie de bassins subaquatiques afin d'analyser les processus majeurs ayant modelé leur bassin et de mieux comprendre leur dynamique sédimentaire passée et récente. Une telle approche appliquée dans des fjords-lacustres situés à des endroits stratégiques permettrait d'ailleurs de raffiner l'histoire de la déglaciation tardi-quaternaire dans certaines régions où les reconstitutions paléoenvironnementales sont peu nombreuses. Cette thèse présente et analyse les données bathymétriques et sismo-stratigraphiques à haute résolution de huit fjords-lacustres du Québec (lacs Mékinac, Jacques-Cartier, Pohénégamook, Témiscouata, Pentecôte, Walker et Pasteur) et du Labrador (Lac Grand), ainsi que les modèles numériques de terrain (MNT) de leur vallée et environs. L'analyse géomorphologique et sismo-stratigraphique des huit lacs a permis de 1) reconstituer la séquence de déglaciation en Mauricie et dans l'est du Labrador; 2) raffiner la position du complexe morainique Mars-Batiscan ainsi que la limite de la mer de Champlain sur la rive nord du Saint-Laurent; 3) mieux comprendre la dynamique du retrait glaciaire dans les fjords de Mékinac et Grand durant les périodes de refroidissements climatiques du Dryas récent et de l'événement de 8.2 ka BP; et 4) construire un modèle d'évolution morpho-stratigraphique des fjords-lacustres du Québec et du Labrador, de la déglaciation à aujourd'hui. / Sediments contained in fjords have a high potential to reconstruct paleoenvironmental changes since these glacial valleys located at the interface of continent and ocean are generally characterized by high sedimentation rates. Fjords are long narrow valleys that were deeply incised during successive glaciations and interglacial periods. They typically contain glacial deposits and landforms that inform on past variations of ice margins. Fjords can also exist in lacustrine environments, such as in alpine area or formerly glaciated regions, where the glacio-isostatic rebound combined with the postglacial marine regression isolated the fjord from the sea. Many fjord-lakes are found in Québec and Labrador, but the evolution of these lacustrine basins since deglaciation is poorly documented, as many worldwide analogues of these type of lakes are still glaciated today, or are located in alpine regions where no marine transgression ever occurred. Hydroacoustic technologies such as multibeam bathymetry and sub-bottom profiles allow visualizing at a high resolution the morpho-stratigraphy of subaquatic basins in order to interpret the major events that modeled their basins and lead to a better understanding of their past and modern sedimentary dynamics. Using such an approach in fjord-lakes located at key locations would also allow refining history of last glaciation in areas where only few paleoenvironmental studies exist. This thesis reports and describes multibeam bathymetry data and sub-bottom profiles collected in eight fjord-lakes of Québec (lakes Mékinac, Jacques-Cartier, Pohénégamook, Témiscouata, Pentecôte, Walker & Pasteur) and Labrador (Grand Lake), as well as Digital Elevation Model (DEM) of their valleys and surrounding areas. The analysis that combine geomorphology and sismo-stratigraphy allow: 1) reconstructing the sequence of deglaciation in Mauricie (Southern Québec) and eastern Labrador; 2) refining the location of the Mars-Batiscan morainic belt as well as the transgression limit of the deglacial Champlain Sea on the north shore of the St. Lawrence River; 3) a better understanding of the dynamics of ice retreat in the fjords of Mékinac and Grand during climatic cold episodes (Younger Dryas and 8.2 ka BP event, respectively); and 4) establishing a model of morpho-stratigraphic evolution for fjord-lakes of Québec-Labrador, from deglaciation to the postglacial period.
102

The glacial geomorphology of the Shoal Lake area, Labrador /

Cowan, William Richard January 1967 (has links)
No description available.
103

The complexity of the merchant-fisher relationship : revising the merchant domination thesis /

Adams, Gordon, January 2001 (has links)
Thesis (M.M.S.)--Memorial University of Newfoundland, 2001. / Restricted until June 2002. Bibliography: leaves 43-44.
104

An agency for the common weal the Newfoundland Board of Trade, 1909-1915 /

Hong, Robert G. January 1900 (has links) (PDF)
Thesis (M.A.)--Memorial University, 1998. / Includes bibliographical references.
105

"The dayspring from on high hath visited us" : an examination of the missionary endeavours of the Moravians and the Anglican Church Missionary Society among the Inuit in the Arctic regions of Canada and Labrador, (1880s-1920s)

Davis, Davena, 1940- January 1987 (has links)
No description available.
106

Ecology of the Arctic charr (Salvelinus alpinus) in northern Labrador with reference to their parasite faunas

Bouillon, Daniel Richard. January 1985 (has links)
No description available.
107

Sources and transport of late Quaternary sediments, Karlsefni Trough, Labrador Shelf

Veldhuyzen, Hendrik. January 1981 (has links)
No description available.
108

Healing Sheshatshit : Innu identity and community healing

Degnen, Cathrine. January 1996 (has links)
Community healing is an issue of great importance today in many Native communities across Canada, and yet the concept goes largely undiscussed by medical anthropologists who have instead traditionally focused on the 'ethnomedicine' and poor health conditions of these communities. For Innu of Sheshatshit, Labrador, community healing involves much more than mending physical aliments. Healing signifies a move towards new social meaning and coherence and is a forum for negotiating Innu identity. This thesis attempts to redress this gap in the literature by describing the deeply nuanced meanings community healing takes on in community discourse and its implications for contemporary Innu identity. Additionally, this account explores the significance of nostalgia for the past and of country space in community discourse as it relates to community healing.
109

The glacial geomorphology of the Shoal Lake area, Labrador /

Cowan, William Richard January 1967 (has links)
No description available.
110

[The] dayspring from on high hath visited us" : an examination of the missionary endeavours of the Moravians and the Anglican Church Missionary Society among the Inuit in the Arctic regions of Canada and Labrador, (1880s-1920s)

Davis, Davena January 1987 (has links)
No description available.

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