Lapa das boleiras rockshelter: stratigraphy and formation processes at a paleoamerican site in Central Brazil

Araújo, Astolfo Gomes de Mello; Feathers, James K.; Arroyo‐Kalin, Manuel; Tizuka, Michelle Mayumi

doi:10.1016/j.jas.2008.07.007

Cited by 65 publications

(39 citation statements)

References 35 publications

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“…BP (Table 1). This hiatus is marked by the complete absence of anthropogenic sediment accumulation, a process already observed at other sites in the Lagoa Santa area (Araujo et al 2005;Araujo et al 2008;Araujo et al 2012).…”

Section: Taquaraçu Archaeological Sitesupporting

confidence: 55%

Before Lagoa Santa: Micro-remain and technological analysis in a lithic artifact from the Itaparica industry

Flores

Sousa

Araújo

et al. 2016

JLS

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Abstract:In this article we present the results of a series of analysis performed on a lithic artifact from the Itaparica industry, a limace, found in Lapa Grande de Taquaraçu, an archaeological site bordering the Lagoa Santa area in Central Brazil. The site was occupied between 11.477 ± 133 cal. BP and 1.087 ±78 cal. BP, and the archaeological record for this occupation is related to the archaeological Lagoa Santa Tradition. However, the artifact was found in deeper and relative older archaeological levels, in a different stratigraphy context. The technological analysis confirms its exotic nature, not corresponding to the Lagoa Santa industry, but to another Paleoindian archaeological tradition instead. Its technological features are similar to the limaces related to Itaparica Tradition lithic industries. It's important to notice that this is the only limace found at Lagoa Santa until now, and archaeological context did not allow us to associate it to the Lagoa Santa Tradition. In order to have an insight on the use of this artifact we performed some technological and micro-remain analysis. Various starch grains and other materials were recovered from the active parts of the artifact. The microbotanical analysis indicated the use of the artifact for processing starchy plants. As far as we know, this is the most ancient evidence of the processing of starchy plants in the Americas.

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Section: Taquaraçu Archaeological Sitesupporting

confidence: 55%

Before Lagoa Santa: Micro-remain and technological analysis in a lithic artifact from the Itaparica industry

Flores

Sousa

Araújo

et al. 2016

JLS

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“…However, OSL dating of single-grains of quartz has been also used to verify post-depositional disturbance on archeological sites by Araujo et al 2008 andFeathers et al 2010. The luminescence signal due to the absorbed radiation dose can be measured by stimulating the sample (usually quartz or feldspar) with light of one wavelength and monitoring the luminescence (OSL) at another wavelength.…”

Section: Measurement Of Equivalent-dosementioning

confidence: 99%

“…Hundreds to thousands of luminescence dating surveys have been performed in Quaternary sediments from Australia, Europe and United States. Despite the huge continental and coastal Quaternary sedimentary record in Brazil, only few dating studies have been performed during the last decades (Poupeau et al 1984, 1988, Suguio et al 1999, Barreto et al 2001, Teeuw and Rhodes 2004Giannini et al 2007, Araujo et al 2008, Sawakuchi et al 2008, Tatumi et al 2008, Tsoar et al 2009, Feathers et al 2010, Sallun and Suguio 2010, Soares et al 2010, Bueno et al 2012. However, luminescence dating has limitations regarding laboratory procedures and sediment characteristics.…”

mentioning

confidence: 99%

“…However, luminescence dating has limitations regarding laboratory procedures and sediment characteristics. Using data from single-grain dating of quartz Araujo et al (2008), Feathers et al (2010 and Bueno et al (2012) make considerations regarding the integrity of archeological sites at central Brazil to validate radiocarbon dates. However, still lack information regarding the luminescence behavior of the quartz found in Brazilian sediments and its suitability for radiation dose estimates using the SAR protocol.…”

mentioning

confidence: 99%

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Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating

Guedes

Sawakuchi

Giannini

et al. 2013

An. Acad. Bras. Ciênc.

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This study analyzes the optically stimulated luminescence (OSL) characteristics of quartz grains from fluvial, eolian and shallow marine sands of northeastern and southeastern Brazil, with especial focus on the applicability of the single-aliquot regenerative dose (SAR) dating protocol. All analyzed Brazilian sediments presented relatively high OSL sensitivity and good behavior regarding their luminescence characteristics relevant for radiation dose estimation. However, some samples from the Lençóis Maranhenses region in northeastern Brazil showed inadequate OSL sensitivity correction, hampering the implementation of the SAR protocol and their ability to behave as a natural dosimeter. While the shallow marine and eolian samples showed a narrow and reliable dose distribution, the fluvial sample had a wide dose distribution, suggesting incomplete bleaching and natural doses estimates dependent on age models.

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“…Dada à ausência de material orgânico sindeposicional, o método mais apropriado para a obtenção da idade do depósito é a Luminescência Opticamente Estimulada (LOE). O método de datação por LOE vem sendo amplamente utilizado, com sucesso, na última década em sedimentos continentais e costeiros no Brasil (Giannini et al 2007, Araujo et al 2008, Sawakuchi et al 2008, Tatumi et al 2008, Tsoar et al 2009, Feathers et al 2010, Sallun & Suguio 2010, Soares et al 2010, Guedes et al 2011, Bueno et al 2012. Nos últimos anos, com a aplicação do protocolo Single Aliquot Regeneration-dose (SAR), os resultados passaram a apresentar alta confiabilidade, com validação por diversos testes intrínsecos ao protocolo bem como por outros métodos geocronológicos (Banerjee et al 1999, Murray & Wintle 2000, Wintle & Murray 2006.…”

Section: Introductionunclassified

Idades de deposição dos sedimentos da falésia de Itaguaré (Bertioga-SP) determinadas por luminescência opticamente estimulada

Guedes

Mendes

Giannini

et al. 2017

ABEQUA

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ResumoA região da foz do rio Itaguaré, localizada no Parque Estadual da Restinga de Bertioga-SP, apresenta uma miscelânea de processos sedimentares e formas de leito atuais gerados pela ação de marés, ondas e do próprio rio. Ocorrem também depósitos sedimentares quaternários expostos ao longo de falésia de dezenas de metros de extensão por até 4m de altura, formados por processos de ondas análogos aos observados na praia adjacente. Seus depósitos sedimentares são compostos por areias finas, moderadamente a bem selecionadas, com estratificação plano-paralela, tendo em sua porção inferior (~0,5m) icnofósseis de Ophiomorfa nodosa (galerias de Callichirus sp.). Esta sucessão sedimentar é indicativa de deposição sob o espraiamento de ondas, em condições regressivas, e com nível relativo do mar cerca de 1,4±1,0m acima do atual, estimado pela comparação da cota máxima de ocorrência do O. nodosa com o topo da biozona de Callichirus vivente. Duas amostras de sedimentos (Ber-01, basal, e Ber-02, topo) foram datadas por luminescência opticamente estimulada (LOE), com o uso do protocolo Single Aliquot Regeneration-dose (LOE-SAR). O método geocronológico por LOE-SAR indica, por premissa, a idade de última exposição à luz solar que, nesse caso, é a idade de deposição do sedimento. As medidas de dose equivalente ou paleodose obtidas em 18 (Ber-01) e 20 (Ber-02) alíquotas apresentaram baixos valores de dispersão (7,8% e 7,5%, respectivamente), calculados pelo parâmetro overdispersion de distribuição de dados. Esta baixa dispersão é o melhor indicador de que as amostras foram fotoesvaziadas previamente à deposição e soterradas com sinal LOE residual próximo de zero, e que, portanto, os processos de mistura pós-deposicionais são negligenciáveis para a interpretação dos resultados. As idades (Ber-01: 4,4±0,3 ka e Ber-02: 3,6±0,2 ka) são estratigraficamente coerentes e, além disso, compatíveis com as curvas do nível relativo do mar mais aceitas para a região, o que eleva a confiabilidade dos resultados. Palavras-chave:Holoceno; datação; nível relativo do mar. AbstractThe Itaguare River mouth region, located in "Parque Estadual da Restinga de Bertioga-SP", is frequently used for didactic classes in sedimentary geology and related areas. It presents a miscellany of sedimentary processes and bed forms generated by the action of tides, waves and the river. Quaternary sedimentary deposits outcropping along a cliff with tens of meters of extension and up to 4m in height formed by beach processes, similar to those observed at the beach nearby. The deposits are composed of fine, moderately to well-selected sands with plane-parallel stratification, presenting in their lower portion (~ 0.5m) Ophiomorfa nodosa (Callichirus sp. galleries) ichnofossils. This sedimentary succession is indicative of deposition in the swash zone, in a regressive condition, and with a relative sea level around 1.4±1.0 m above the present, estimated by comparing the maximum level of O. nodosa occurrence with the top of the living Callichirus biozone. Two sediment sa...

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Lapa das boleiras rockshelter: stratigraphy and formation processes at a paleoamerican site in Central Brazil

Cited by 65 publications

References 35 publications

Before Lagoa Santa: Micro-remain and technological analysis in a lithic artifact from the Itaparica industry

Before Lagoa Santa: Micro-remain and technological analysis in a lithic artifact from the Itaparica industry

Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating

Idades de deposição dos sedimentos da falésia de Itaguaré (Bertioga-SP) determinadas por luminescência opticamente estimulada

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