Kinoshita, Angela and Brunetti, Antonio and Avelar, Wagner E. P. and Mantelatto, Fernando Luis Medina and Simões, Marcello Guimarães and Fransozo, Adilson and Baffa Filho, Oswaldo (2002) ESR dating of a subfossil shell from Couve Island, Ubatuba, Brazil. Applied Radiation and Isotopes, Vol. 57 (4), p. 497-500. ISSN 0969-8043. Article.
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The occurrence of subfossil material in bottom sediments of Couve Island, Ubatuba region, São Paulo State, is confirmed. The analyzed material consists of a bivalve shell that was dated by the electron spin resonance technique. By the additive irradiation method an archaeological absorbed dose of (25±5) Gy was obtained and calibration with other dating works in the same area allows the inference of an age of (25±5)×102 years. The importance of this finding and its paleoecological implications could contribute to elucidating the nature of short-term environmental changes in the Brazilian coastline during the Holocene, as well as becoming an important tool to the understanding of the distribution and biological aspects of the bivalve fauna.
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