GEOSCAN, résultats de la recherche


TitrePalaeogeography of Atlantic Canadian continental shelves from the Last Glacial Maximum to the present, with an emphasis on Flemish Cap
AuteurShaw, J
SourceFlemish Cap Symposium 2004; Journal of Northwest Atlantic Fishery Science vol. 37, 2006 p. 119-126, (Accès ouvert)
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 2004344
ÉditeurNorthwest Atlantic Fisheries Organization (NAFO)
RéunionFlemish Cap Symposium 2004: The Symposium on The Ecosystem of the Flemish Cap; Dartmouth, NS; CA; Septembre 8-10, 2004
Documentpublication en série
Mediapapier; en ligne; numérique
ProvinceRégion extracotière; Terre-Neuve-et-Labrador
SNRC1; 2; 11; 12A; 12B; 12C; 12D; 12E; 12F; 12G; 12H; 21; 22A; 22B; 22C; 22E; 22F; 22G
Lat/Long OENS -70.0000 -45.0000 50.0000 44.0000
Sujetsglaciation; datation au radiocarbone; retrait de la glace; milieu côtièr; milieu littoral; géologie marine; géologie des dépôts meubles/géomorphologie; Nature et environnement
Illustrationslocation maps
ProgrammeRéduire la vulnérabilité du Canada au changement climatique
ProgrammeAtlantic Canada Ice Dynamics (ACID) Project
ProgrammeIGCP Project 464 - Continental Shelves during the Last Glacial Cycle: Knowledge and Applications
Diffusé2006 11 10
Résumé(disponible en anglais seulement)
Flemish Cap is a fragment of continental crust detached from related terranes in Europe and Ireland by crustal spreading and stretching over the last 150 Ma. It has a core of basement rocks (chiefly Hadrynian granite) surrounded by younger sedimentary rocks. Since the last glacial maximum the geography of the surrounding shelves has changed due to glacial eustatic and isostatic processes. Glacier ice reached the edge of the continental shelves in most areas at its maximum extent. The ice retreated by calving in deeper water, with accelerated calving of the Gulf of St. Lawrence beginning just before 14 ka BP (radiocarbon years). By 13 ka BP ice was largely confined to land areas. An archipelago on the outer shelf, from Grand Bank to the continent, persisted from >13 ka BP until c. 8 ka BP. Flemish Cap was probably not glaciated, although it was - and continues to be - impacted by icebergs. It was probably not emergent, although it was impacted by high wave energy during sealevel lowering. In comparison with the more 'hostile' glacial and ice-proximal environments along the shelf edge from southern Labrador to New England Flemish Cap was a relatively benign shallow-water environment with hard substrates, and may be a suitable candidate for a glacial marine refugium.