Thermal properties of clays, experimental discs, and archaeological ceramics. The case of the Salado River depression in Buenos Aires (Argentina)
The archaeological evidence from the lower basin of the Salado river (Buenos Aires province) shows us a scenario in which hunter-gatherer-fisher groups settled and manufactured ceramics for almost 2400 years. These groups had direct access to resources such as clay, water and wood to be used as fuel...
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| Autores principales: | , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Instituto de Arqueología, Facultad de Filosofía y Letras, Universidad de Buenos Aires
2024
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| Acceso en línea: | http://revistascientificas.filo.uba.ar/index.php/Arqueologia/article/view/13401 |
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| Sumario: | The archaeological evidence from the lower basin of the Salado river (Buenos Aires province) shows us a scenario in which hunter-gatherer-fisher groups settled and manufactured ceramics for almost 2400 years. These groups had direct access to resources such as clay, water and wood to be used as fuel, suitable for making containers in which different food resources were cooked and stored. This article presents the thermal results of local clays and experimental discs, through the application of three analytical techniques (X-ray Diffraction, Thermal Expansion, Differential Thermal and Thermogravimetric Analysis). In this study the porosity percentages of experimental samples and archaeological potsherds were also recorded through an adaptation of the Archimedes Method. The main goal of this work is to contrast the results obtained from the manufacture of experimental discs using local clays and their subsequent firing, with the thermal data obtained in archaeological potsherds to investigate possible firing temperatures to which the ceramics of the area were subjected. The thermal results of the clays, the experimentation, and the archaeological materials show similarities in the maximum firing temperatures reached (< 950 ºC) and in the diffractograms in relation to the minerals found. The porosity percentage is less than 33% indicating the use of low temperature porous clays. |
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