Abstract
The Paraíba do Sul River's valley, east of the São Paulo state, is constituted by Taubate sedimentary basin of tertiary and quaternary age. During the recent period (Quaternary) the geomorphology of the valley consists of the Paraíba do Sul river's meander abandoned, periodically subject to the sedimentary fill (sand and organic clays), provoked by the seasonal floods. In the Tremembé mun…