Primera evidencia de oxalatos y su datación en el sustrato rocoso de Toca do Baixão do Milho, Caracol, Piauí, Brasil
DOI:
https://doi.org/10.24885/sab.v39i2.1405Palabras clave:
Datación, Whewellita, Weddelita, Caracol, Piauí, Ocupación de AméricaResumen
Los yacimientos arqueológicos del estado de Piauí, Brasil, presentan eflorescencias salinas en abrigos rocosos. En el yacimiento arqueológico Toca do Baixão do Milho, se identificaron y dataron por radiocarbono los minerales whewellita (CaC₂O₄·H₂O) y weddellita (CaC₂O₄·2H₂O). Dada la relevancia del área de investigación para la historia de las Américas, los datos de radiocarbono de Serra das Confusões, Piauí, Brasil, fueron comparables a los datos de oxalato de calcio del Parque Nacional Serra da Capivara, Piauí, Brasil. Los resultados indican similitudes entre las dos áreas y que se deberían investigar más a fondo los minerales carbonáceos para establecer un marco de datos sólido que permita reevaluar o corroborar las edades condicionales de la ocupación de las Américas en el área de estudio.
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