Interpreta？？es paleoambientais obtidas a partir das varia？？es na colora？？o das carapa？as de foraminíferos, da Enseada do Flamengo, SP

two cores obtained respectively from saco da ribeira and saco do perequê-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 perequê-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.