The environmental changes that occurred in different periods can be identified through the increase or decrease of the concentrations
of metals and other substances throughout sediment cores. The purpose of this study was to determine Al, As, Ba, Br, Cs, Eu,
K, La, Mn, Sb, Sc, Sm, Th, Ti, U and V in a sediment core collected from São Paulo State South Seashore. Instrumental neutron
activation analysis followed by gamma-ray spectrometry was the analytical method used. Results showed an abrupt decrease in
the concentration of all elements in the 132–134 cm layer depth. This finding indicates an impact of anthropic activity.