Upper Pleistocene deposits of the Comprida Island (São Paulo State) dated by thermoluminescence method

SUGUIO KENITIRO; TATUMI SONIA H.; KOWATA EMÍLIA A.; MUNITA CASIMIRO S.; PAIVA ROSEMEIRE P.

Upper Pleistocene deposits of the Comprida Island (São Paulo State) dated by thermoluminescence method

2003

SUGUIO KENITIRO | TATUMI SONIA H. | KOWATA EMÍLIA A. | MUNITA CASIMIRO S. | PAIVA ROSEMEIRE P.

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.

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