A glacial origin of Sable Island: ice and sea-level fluctuations from seismic stratigraphy on Sable Island Bank, Scotian Shelf, offshore Nova Scotia

A database of interpreted geological cross-sections assembled from analogue high-resolution seismic-reflection profiles from Sable Island Bank has been compiled. A preliminary seismostratigraphy has enhanced understanding of the mid–late Pleistocene section. Numerous units and their bounding unconformities indicate a complex history of glaciogenic and sand-sheet deposition and associated sea-level fluctuations. A near-shelf-break ice-maximum position is interpreted for the Late Wisconsinan and inferred for earlier stades and/or glaciations. A late readvance sometime between 16 ka and 14 ka deposited a thick sand body over the transgressed bank, forming ancestral Sable Island. Modification and transport of sands accompanied a subsequent transgression. The database will provide the basis for compilation of a lithological and geotechnical zonation and a suite of maps depicting unit thickness and distribution, unconformities, and subsurface features, including geohazards, as well as large-scale (>1.5 m high) surficial bedforms. 2001-D19 E.L. King 1 CURRENT RESEARCH RECHERCHES EN COURS 2001 Article Article Titles Titres Purchase Information Information pour acheter