GEOSCAN, résultats de la recherche

Menu GEOSCAN


TitreSurficial geology of the northwestern Canadian continental shelf
AuteurBarrie, J V; Bornhold, B D; Conway, K W; Luternauer, J L
SourceThe seabed of the Canadian shelf: Proceedings of the Canadian continental shelf seabed symposium (C2S3); par Amos, C L (éd.); Collins, M (éd.); Continental Shelf Research vol. 11, no. 8-10, 1991 p. 701-715, https://doi.org/10.1016/0278-4343(91)90075-h
Année1991
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 21091
ÉditeurElsevier BV
RéunionCanadian Continental Shelf Seabed Symposium (C2S3); Dartmouth, NS; CA; Octobre 2-7, 1989
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/0278-4343(91)90075-h
Mediapapier; en ligne; numérique
Formatspdf
ProvinceRégion extracotière de l'ouest
SNRC103A; 103B; 103C; 103F; 103G; 103H; 103I; 103K; 103J
Lat/Long OENS-134.0000 -128.0000 54.5000 51.0000
Sujetsplate-forme continentale; tills; fosses abyssales; dépressions; boues; dépôts glaciomarins; retrait de la glace; deltas d'épandage fluvio glaciaire; cônes d'épandage fluvio glaciaire; déplacement des sédiments; trangressions; géologie marine; géologie des dépôts meubles/géomorphologie; Tertiaire
Illustrationslocation maps; stratigraphic columns; sesimic reflection profiles
Résumé(disponible en anglais seulement)
The northwestern Canadian continental shelf, including Dixon Entrance, Hecate Strait and Queen Charlotte Sound, can be divided into four surficial geological units all overlying Tertiary bedrock within the Queen Charlotte Basin. They include: (1) glacial till, deposited primarily in the troughs between banks and considered to be late Wisconsinan in age; (2) glaciomarine mud, deposited in the troughs as ice retreated from the shelf; (3) Queen Charlotte sands and gravels, outwash deposition in the north and sublittoral sand deposition in the south during sea level low stand and subsequent reworking during transgression; and (4) Queen Charlotte muds, deposited within the troughs of the region from late Wisconsinan times until present. These units are a result of a glaciation ending 15,000 - 13,000 years BP followed by relative sea level lowering by approximately 100 m, that persisted until 10,500 years ago, and a subsequent transgression that occurred over approximately 1500 years in a series of steps.
GEOSCAN ID203926