ABSTRACT A cylindrical fragment of stalagmite from Caverna do Diabo, State of São Paulo, Brazil, has been studied and dated by thermoluminescence and electron paramagnetic resonance techniques. The thermoluminescence glow curves of stalagmite samples and subsequently gamma irradiated, have shown rise of three peaks at 135, 180 and 265 °C. From electron paramagnetic resonance spectra of stalagmite was possible to clearly identify three paramagnetic centers in the g = 2.0 region: Centers I, II and III are due to , and , respectively. The additive method was applied to calculate the accumulated dose using thermoluminescence peak at 265 °C and the electron paramagnetic resonance signal at g = 1.9973 of CO- 2 radical. The ages of the different slices of stalagmite were determined from the Dac- values and Dan- value, obtaining an average of 86410 for central slice, 53421 for second slice, 31490 for third slice and 46390 years B.P. for the central region of upper end.

As formações Cananéia (Pleistoceno superior) e Ilha Comprida (Holoceno), aflorantes na Ilha Comprida (SP), foram mapeadas com base em critérios geomorfológicos e litológicos. Uma amostra da Formação Cananéia, coletada na ilha homônima em frente à Ilha Comprida, apresentou idade superior ao alcance do método convencional de radiocarbono. Deste modo, desde a publicação de mapas geólogos da área em 1978, havia algumas dúvidas sobre a real ocorrência de depósitos pleistocênicos na extremidade sul desta ilha. Neste trabalho, são apresentados os resultados de idades TL de oito amostras, coletadas na Ilha Comprida, que vieram corroborar a idade pleistocênica atribuída durante o mapeamento geológico desses depósitos. Por outro lado, são apresentadas as possíveis interpretações das idades encontradas, em relação aos seus ambientes deposicionais e aos eventos glacias quaternários do hemisfério norte.

The Cananéia (Upper Pleistocene) and the Comprida Island (Holocene) formations, outcropping in the Comprida island (SP) have been mapped using geomorphological and lithological criteria. Only one sample of the Cananéia Formation, collected in the homonymous island in front of the Comprida Island, was beyond the limit of the standard radiocarbon method. But since the publication of the geological map of the area in 1978, there has been some doubt on the real occurrence of Pleistocene deposits in southern extremity of Comprida Island. This paper deals with the results of thermoluminescence (TL) ages of eight samples from Comprida Island, which corroborate the Pleistocene age assumed during mapping surveys of these deposits. On the other hand, possible interpretations of the obtained ages, in relation to their depositional environments and related northern hemisphere Quaternary glaciations, are presented.