Late Cenozoic Stratigraphy of the Central Scotian Slope, Eastern Canada

摘要: ABSTRACT High-resolution multichannel seismic profiles have been used to define the Quaternary stratigraphy for Scotian Slope in area of Acadia K-62 and Shubenacadie H-100 wells southwest Sable Island Bank. Seven key reflectors are identified correlated through much study area. The provide biostratigraphic control this stratigraphy. During Neogene, sediments accumulated slowly uniformly on slope; these now give continuous, parallel acoustic reflectors. A broad, shallow, ancestral valley site present Verrill Dawson canyons was cut during earliest part Late Pliocene, reflecting a low stand sea level. then filled by fine grained sediment. Subsequently, further lowering level resulted gully canyon cutting an increase sedimentation rates about 0.2 m/ka. In Quaternary, continued led sediment bypassing continental slope lower (0.1 m/ka). High (0.4 m/ka) found only some intercanyon areas levee-like accumulations close ice margin tills deposited upper slope. LA STRATIGRAPHIE DU CENOZOIQUE TARDIF, PENTE CONTINENTALE SCOTIAN CENTRAL, EST CANADA RESUME Des coupes sismiques canaux multiples et haute definition ont ete utilisees afin de determiner la stratigraphie sismique Quaternaire pente continentale Scotian, dans region des puits au sud-ouest du banc l'ile Sable. Sept reflecteurs-cles identifies correles travers une grande partie etudiee. Les donnees fournissent base biostratigraphique cette sismique. Durant le l'accumulation sur fut lente uniforme; ces derniers donnent maintenant reflecteurs acoustiques ininterrompus paralleles. Une vallee ancestrale large peu profonde, situee caons Dawson, taillee durant plus precoce Pliocene tardif reflete un niveau marin abaisse. La ensuite remplie grain fin. Plus tard, tardif, autre abaissement suivi l'excavation ravins caons, d'une augmentation taux jusqu'a pres 0,2 Quaternaire, continue amena beaucoup eviter entraina diminution (0,1 On retrouve eleves (0,4 seulement certaines zones intercaon amoncellements ayant l'aspect levees, depots morainiques formes en marge glace superieure continentale. Traduit par bulletin