Title: Interaction of drift and gravitational depositional processes on the sedimentary architecture of the southern Brazilian continental margin
Abstract: Based on seismic facies analysis of about 8.000 km of multichannel seismic lines (LEPLAC IV), we interpreted that gravitational and drift processes have had an important role on the sedimentary construction and evolution of the Brazilian South Margin. Until the Eocene, progradational sedimentary processes were essentially gravitational in nature. In some places, such as the northeast sector of the margin, deposition was conditioned by basement features that acted as obstacles for sediment dispersal. However, after the Upper Eocene, the margin experienced the prevalence of contour currents influence, whose deposition shifted mostly to northeast, seawards and backwards Drift deposits exhibit different shapes and seismic facies, which indicate a variety of depositional environments in the study area.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
Indexed In: ['crossref']
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