%0 Journal Article
%T Distribui£¿£¿o sedimentar da Lagoa Rodrigo de Freitas atrav¨¦s de s¨ªsmica de alta resolu£¿£¿o
%A Baptista Neto
%A Jos¨¦ Ant£¿nio
%A Silva
%A Cleverson Guizan
%A Dias
%A Gilberto Tavares de Macedo
%A Fonseca
%A Estefan Monteiro da
%J Revista Brasileira de Geof¨ªsica
%D 2011
%I Scientific Electronic Library Online
%R 10.1590/S0102-261X2011000100013
%X the rodrigo de freitas lagoon (rio de janeiro state) sediments and bottom characteristics were analyzed using high-resolution (10 khz) sub-bottom profiles associated with particle size analyses of 44 bottom sediment samples. four types of echo-characters were identified revealing the strong relation with the particle size distribution and bottom morphology. in areas of acoustic penetration, the basement delineates buried sugar-loaf hills and infilled-valley features. the total sediment thickness can reach as much as 16 meters along the paleovalleys, which are aligned in a ne-sw direction, parallel to the regional basement orientation observed on the coastal massifs. there is a predominance of organic rich muddy sediments, infilling the paleovalleys which are the main sites of shallow gas occurrences within the lagoonal sediments.
%K shallow seismic
%K rodrigo de freitas lagoon
%K sedimentary processes.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0102-261X2011000100013&lng=en&nrm=iso&tlng=en