Direct radiocarbon dating of megalithic paints from north-west Iberia
Description: Using plasma chemistry, carbon was extracted from charcoal paint samples collected from megalithic monuments in northwest Iberia. Nine accelerator mass spectrometric radiocarbon dates on these paints establish their age to be within 1000 14 C years of each other, centered at approximately 5000 BP. These radiocarbon ages for megalithic paintings fall within the proposed […]
Rock Painting Depicting Re-incursion of Bison onto the South Texas Plains: Painted Indian Cave, Pedernales River, Blanco County, Texas
Description: We extracted carbon from a sample removed from a small, nondescript, solid monochrome pictograph at the Painted Indian Cave site on the Pedernales River, Blanco County, Texas (41BC1). It contains red iron oxide pigment and is approximately 10-20 cm in size. The sample was taken with a surgical scalpel with a new blade. Plasma […]
Calcium oxalate AMS 14C dating and chronology of post-Palaeolithic rock paintings in the Iberian Peninsula. Two dates from Abrigo de los Oculados (Henarejos, Cuenca, Spain)
Additionally, Iberia possesses a larger number of decorated Palaeolithic, Epipalaeolithic, Neolithic, Chalcolithic, Bronze Age, and Iron Age sites than any other studied region in Europe (Breuil 1933(Breuil -1935Acosta 1968; Beltrán 1968; Bueno Ramírez & Balbín Behrmann 1992, 2009aBueno Ramírez et al. 2004, 2007a, 2016aMartinez García 2006; Luís 2009; Royo Guillén 2009; Utrilla-Miranda 2013; Villaverde Bonilla […]
A Companion to Rock Art
Description: The team employed a combination of plasma oxidation and accelerator mass spectrometry, which has been used to date rock paintings worldwide (e.g., Russ et al., 1990; Steelman et al., 2005; Rowe, 2009). In contrast to traditional combustion methods, plasma oxidation occurs below the decomposition temperature of carbon-containing minerals such as carbonates and oxalates; therefore, […]
Cronología del arte rupestre postpaleolítico y datación absoluta de pátinas de oxalato cálcico. Primeras experiencias en Castilla-La Mancha (2004-2007).
Application of supercritical carbon dioxide-co-solvent mixtures for removal of organic material from archeological artifacts for radiocarbon dating
The wastewater generated during sheep wool processing poses serious environmental and economic concerns, as effective treatment is required to remove impurities prior to the discharge or recycling of water. Due to the detrimental impact of existing sheep wool processing techniques, the annual production of wool in the textile industry has reduced to 75% in European […]
Lower Pecos and Coahuila Peyote: New Radiocarbon Dates
Description: Peyote, a psychoactive cactus native to the Chihuahuan Desert, has been preserved from excavations at only two archaeological sites: Shumla Caves in the Lower Pecos region of southwest Texas and shelter CM-79 near Cuatro Ciénegas in Coahuila, Mexico. We determined three indistinguishable radiocarbon ages of 5160 ± 45, 5200 ± 35, and 5210 ± […]
X‐ray photoelectron and FTIR spectroscopic investigation of cement doped with barium nitrate
Description: The chemical environment of barium in Portland cement which is doped with barium nitrate was investigated using x‐ray photoelectron spectroscopy (XPS) and Fourier Transform Infrared spectroscopy (FTIR). The barium-doped cement showed tremendous increases in carbonate content over the undoped cement. An XPS sulfate signal was observed in the cement doped with 20% w/w Ba(NO3)2 […]
Radiocarbon dating of rock paintings: incorporating pictographs into the archaeological record
Description: Understanding the mechanisms causing paint and bedrock degradation (Hernanz et al. 2007; Aramendia et al. 2020) are some of the common archaeological questions that can be effectively unraveled through physicochemical analyses. Beyond the more traditional dating purposes (Steelman and Rowe 2012; Ochoa et al. 2021), analytically studying rock paintings, we can gain information about […]
A Companion to Rock Art
Description: The team employed a combination of plasma oxidation and accelerator mass spectrometry, which has been used to date rock paintings worldwide (e.g., Russ et al., 1990; Steelman et al., 2005; Rowe, 2009). In contrast to traditional combustion methods, plasma oxidation occurs below the decomposition temperature of carbon-containing minerals such as carbonates and oxalates; therefore, […]
