%0 Journal Article
%T Interpreta£¿£¿es paleoambientais obtidas a partir das varia£¿£¿es na colora£¿£¿o das carapa£¿as de foramin¨ªferos, da Enseada do Flamengo, SP
%A Duleba
%A Wania
%J Boletim do Instituto Oceanogr¨¢fico
%D 1994
%I Scientific Electronic Library Online
%R 10.1590/S0373-55241994000100005
%X two cores obtained respectively from saco da ribeira and saco do perequ¨º-mirim, both located within flamengo bay, northern coast of s£¿o paulo, brazil, have been studied. at former site many pyrite- filled foraminifera carapaces were observed. at the other site, there occur carapaces filled with pyrite, as well as carapaces impregnated with limonite and iron monosulfide, the latter showing a close relationship between limonite and iron monosulfide impregnated carapaces with strongly bioturbated levels. these observations reveal more reducing conditions in the saco da ribeira than in the saco do perequ¨º-mirim. by quantifying the number of carapaces impregnated with hydroxide/oxide vs. those filled by ferrous sulfide, it was possible to estimate some differences in redox potenciais at these two sites.
%K foraminifers
%K carapaces impregnated with limonite
%K carapaces filled with pyrite
%K potencial redox
%K cores
%K holocene
%K reducing environment
%K enseada do flamengo: sp
%K brasil.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0373-55241994000100005&lng=en&nrm=iso&tlng=en