Coeval shell and charcoal from Santa Catarina State, Brazil, differ systematically in 14C content, indicating a reservoir effect in marine samples. For modern samples (AD 1939–2000) and archeological samples (2500–1595 BP), the mean 14C age difference between marine and atmospheric carbon is 220 ± 20 years, the marine carbon being older. For three samples dated AD 1939–1944, a distinct reservoir correction of 510 ± 10 years is also observed. The ages of archeological shell samples from Jabuticabeira may be corrected by subtracting 220 years from the apparent 14C ages.
A construção de cômoros artificiais (mounds) é um fenômeno de amplo alcance em termos globais. Neste artigo são examinados alguns dos processos responsáveis pela construção destas estruturas no litoral sul de Santa Catarina, tomando-se como referência os trabalhos realizados no sambaqui Jaboticabeira II, município de Jaguaruna. Além da análise dos processos envolvidos na construção daquele sambaqui, procura-se chamar a atenção para os aspectos sociais e demográficos destes mesmos processos, evidenciando um sistema regional de considerável complexidade social e duração cronológica.
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