Name: Sediment substrate / Substrat sédimentaire

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Description: This layer describes the submarine morphology and the characteristics of the sediments (lithology, grain size, mineralogy, and chemistry) of the lower Estuary and Gulf of St. Lawrence.It contains a synthesis of geological and geochemical data collected and interpreted over 10 years and is accompanied by detailed bathymetric and surface sediment maps. Most of this study deals with the geomorphology, surface sediments (lithology, mineralogy, and chemistry), and present depositional conditions, but several studies have also been made of the bedrock geology and the stratigraphy of the unconsolidated sediments. These studies are regional and of a reconnaissance nature in the sense that they have been designed to obtain acoustical and sampling data on the morphology and basic properties of the sediments from the whole Gulf. This approach was used to provide a broad appraisal of the sedimentary environment of the Gulf and its late-glacial and postglacial history.#Fra La couche décrit la morphologie sous-marine et des caractéristiques des sédiments (lithologie, taille des particules, minéralogie et chimie) de l'estuaire maritime et du golfe Saint-Laurent. Elle contient une synthèse des données géologique et géochimique récoltées et interprétées à partir de différentes études réalisées sur une période de 10 ans et est accompagnée par des cartes de bathymétries détaillées et de sédiments de surfaces. L’essentiel de cette étude porte sur la géomorphologie, les sédiments de surface (lithologie, minéralogie et chimie), ainsi que sur les conditions de dépôt présentes à l’époque, mais plusieurs informations ont également été récoltées sur la géologie du substrat rocheux et sur la stratigraphie des sédiments meubles. Il s’agit d’études de reconnaissances à l’échelle régionale conduites avec l’objectif d’obtenir des données acoustiques et d'échantillonnage sur la morphologie et les propriétés de base des sédiments pour l'ensemble du Golfe. Cette approche a été utilisée de façon à fournir une évaluation large de l'environnement sédimentaire du Golfe et de son histoire glaciaire et postglaciaire.

Service Item Id: 613eea37887947ca94f5b04113d22bce

Copyright Text: Loring, D. H., and D. J. G. Nota. 1973. Morphology and sediments of the Gulf of St. Lawrence. Bull. Fish. Res. Bd. Can. 182. 147 p. + 7 charts.

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