title: Marine reservoir effect on the Southeastern coast of Brazil: results from the Tarioba shellmound paired samples.
abstract: On the Southeastern coast of Brazil the presence of many archaeological shellmounds offers a great potential for studying the radiocarbon marine reservoir effect (MRE). However, very few such studies are available for this region. These archaeological settlements, mostly dating from 5 to 2 kyr cal BP, include both terrestrial and marine remains in good stratigraphic context and secure association, enabling the comparison of different carbon reservoirs. In a previous study the chronology of the Sambaqui da Tarioba, located in Rio de Janeiro state, Brazil, was established based on marine mollusc shells and charcoal samples from hearths, from several layers in two excavated sectors. We now compare the different materials with the aim of studying the MRE in this region. Calibration was performed with Oxford software OxCal v4.2.3 using the marine curve Marine13 with an undetermined offset to account for local corrections for shell samples, and the atmospheric curve SHCal13 for charcoal samples. The distribution of results considering a phase model indicates a ΔR value of -127 ± 67 (14)C yr in the 1 sigma range and the multi-paired approach leads to a mean value of -110 ± 94 (14)C yr.
authors.affiliation: Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, S/N, Niterói 24210-346, RJ, Brazil. Electronic address: kitamacario@gmail.com.
authors.forename: K D
authors.initials: KD
authors.lastname: Macario
authors.affiliation: Departamento de Biologia Marinha, Instituto de Biologia, Outeiro São João Batista, s/n, Universidade Federal Fluminense, Niterói 24001-970, RJ, Brazil. Electronic address: rcclsouza@yahoo.com.br.
authors.forename: R C C L
authors.initials: RCCL
authors.lastname: Souza
authors.affiliation: Departamento de Biologia Marinha, Instituto de Biologia, Outeiro São João Batista, s/n, Universidade Federal Fluminense, Niterói 24001-970, RJ, Brazil. Electronic address: orangel.aguilera@gmail.com.
authors.forename: O A
authors.initials: OA
authors.lastname: Aguilera
authors.affiliation: Departamento de Geoquímica, Outeiro São João Batista, s/n, Universidade Federal Fluminense, Niterói 24001-970, RJ, Brazil. Electronic address: c.carvalho@mail.if.uff.br.
authors.forename: C
authors.initials: C
authors.lastname: Carvalho
authors.affiliation: Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, S/N, Niterói 24210-346, RJ, Brazil. Electronic address: fabiana@fisica.if.uff.br.
authors.forename: F M
authors.initials: FM
authors.lastname: Oliveira
authors.affiliation: Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, S/N, Niterói 24210-346, RJ, Brazil. Electronic address: qa.eduardo@gmail.com.
authors.forename: E Q
authors.initials: EQ
authors.lastname: Alves
authors.affiliation: Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, S/N, Niterói 24210-346, RJ, Brazil. Electronic address: ingrid.s.chanca@gmail.com.
authors.forename: I S
authors.initials: IS
authors.lastname: Chanca
authors.affiliation: Departamento de Biologia Marinha, Instituto de Biologia, Outeiro São João Batista, s/n, Universidade Federal Fluminense, Niterói 24001-970, RJ, Brazil. Electronic address: gbmedson@vm.uff.br.
authors.forename: E P
authors.initials: EP
authors.lastname: Silva
authors.affiliation: Oxford Radiocarbon Accelerator Unit, University of Oxford, Dyson Perrins Building, South Parks Road, Oxford OX1 3QY, United Kingdom. Electronic address: katerina.douka@rlaha.ox.ac.uk.
authors.forename: K
authors.initials: K
authors.lastname: Douka
authors.affiliation: Instituto Brasileiro de Pesquisas Arqueológicas, Rua Marques de Leão, 53, Engenho Novo, Rio de Janeiro 20.780-140, RJ, Brazil. Electronic address: javtdedecco@terra.com.br.
authors.forename: J
authors.initials: J
authors.lastname: Decco
authors.affiliation: Instituto Brasileiro de Pesquisas Arqueológicas, Rua Marques de Leão, 53, Engenho Novo, Rio de Janeiro 20.780-140, RJ, Brazil. Electronic address: chamumd@yahoo.com.br.
authors.forename: D C
authors.initials: DC
authors.lastname: Trindade
authors.affiliation: Departamento de Biologia Marinha, Instituto de Biologia, Outeiro São João Batista, s/n, Universidade Federal Fluminense, Niterói 24001-970, RJ, Brazil. Electronic address: aguinaldo.nepomuceno@gmail.com.
authors.forename: A N
authors.initials: AN
authors.lastname: Marques
authors.affiliation: Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, S/N, Niterói 24210-346, RJ, Brazil. Electronic address: meigikos@mail.if.uff.br.
authors.forename: R M
authors.initials: RM
authors.lastname: Anjos
authors.affiliation: Departamento de Biologia Marinha, Instituto de Biologia, Outeiro São João Batista, s/n, Universidade Federal Fluminense, Niterói 24001-970, RJ, Brazil. Electronic address: fbpamplona@yahoo.com.br.
authors.forename: F C
authors.initials: FC
authors.lastname: Pamplona
mesh_terms: D060105:Animal Shells / Q000737:chemistry*; D000818:Animals; D001106:Archaeology; D001938:Brazil; D002138:Calibration; D002250:Carbon Radioisotopes / Q000032:analysis*; D008974:Mollusca / Q000737:chemistry*; D055110:Radiometric Dating
chemical_list: D002250:Carbon Radioisotopes
keywords: Marine reservoir effect; Paired samples; Radiocarbon; Shellmound; South Atlantic coast