Cenozoic seismic stratigraphy of the central Nova Scotian continental margin : the interplay of erosion, deposition and salt tectonics

Abstract

The Cenozoic stratigraphy of the central Scotian Slope, part of the Mesozoic-Cenozoic Scotian Basin, is studied to understand influences of sea level change, salt tectonics and shelf-crossing glaciations on sedimentation patterns in a passive continental margin setting of the northern hemisphere. Interpretations are based on a recent 38 X 38 kilometer 3-D seismic data survey, extended by the study of regional 2-D multichannel seismic reflection, and correlated to biostratigraphic data and geophysical logs to provide new insights into the depositional history of this region. In the study area, Cenozoic strata have been dissected by deeply (500 m) eroded canyon systems during the Pleistocene. Broad inter-canyon regions also bear incomplete stratigraphic successions. These regions provide an opportunity to study the effects of erosional systems and salt tectonics on sedimentation patterns and stratigraphic development through the Cenozoic. (Abstract shortened by UMI.)