94 EL “DIABLO ROJO” DE AMATITLÁN: APLICACIÓN DE UNA TÉCNICA NO DESTRUCTIVA DE CRONOLOGÍA POR RADIOCARBONO
Description: Recientemente se obtuvo una fecha de radiocarbono de 3030 ± 45 14 C AP, de la pictografía roja conocida como Diablo Rojo, por medio de la utilización de extracción con plasma químico y espectrometría de aceleración de masas. Esta es la primera pictografía de las Tierras Altas que ha sido fechada directamente. En la […]
Xenon Anomalies in the Pasamonte Meteorite
Description: Rowe and Kuroda (1965) presented their measurement of the isotopic composition and abundance of xenon in a sample of the Pasa- monte meteorite in which isogenic xenon, pre- presumably from the spontaneous fission of ex- tinct Pu’”, was detected. The Pu’-Xedecay interval was found to be about 300 m.y. The data on a second […]
Cosmic ray spallation and the special anomaly in achondrites
Description: Examination of the isotopic composition of xenon from achondrites reveals that the124Xe, 126Xe, 128Xe and130Xe are all linearly correlated indicating only two principal components for this isotopes-trapped and cosmic ray-produced xenon. No evidence is found for the reaction 127I(n, γβ)128Xe in the achondrites. We thus place approximate limits on the neutron flux relative to […]
Chemical pretreatment on plasma-chemical extraction for 14C dating of Pecos River genre rock paintings
Description: A similar procedure was used for the deer sample, except that no acid wash was performed. Previous results from our laboratory (Hyman and Rowe 1997; Pace et al. 2000) have shown that the acid washes are unnecessary with the plasma Radiocarbon Age of a Wisconsin Rock Painting ill chemical extraction since the plasma does […]
Dated Rock Paintings at Red Cliffs, Arizona
Description: This article presents radiocarbon dates for painted motifs at Red Cliffs, west of Sedona in the northeastern corner of Yavapai County, Arizona. All rock painting shields at the Red Cliffs sites have usually been attributed to the Sinagua. Black pigment from one shield motif and an overlying white dot on another motif yielded uncalibrated […]
Landscapes in Transition? New Radiocarbon Dates on Cave Drawings from the Mitchell-Palmer Limestone Belt (Northeastern Australia)
Description: The fourth radiocarbon-dated rock drawing is located in a protected part of the site in semi-dark conditions on the vertical wall of a large limestone pillar close to the back wall. It consists of a set of ‘Radiating Lines’ (see David et al. 2001:112 for a tracing of this drawing). The radiocarbon date for this […]
RADIOCARBON AGE DETERMINATION OF A ROCK PAINTING AT ARNOLD/TAINTER CAVE, WISCONSIN
Description: A sample from a charcoal rock painting at the Arnold/Tainter Cave site (47Cr560) was radiocarbon dated, providing the first direct age determination for a pictograph in Wisconsin. The sample was pretreated with HCl and NaOH before organic carbon was extracted using an oxygen plasma. The painting, of a creature resembling a caribou because of […]
AMS Radiocarbon Dates for Charcoal from Three Missouri Pictographs and Their Associated Iconography
Description: This report presents four radiocarbon dates of charcoal pigments from Picture Cave, a site located in a remote wooded area in east-central Missouri. Carbon from charcoal pigments was extracted from three rock drawings on the wall of this cave. The four pigment samples contained sufficient carbon for accelerator mass spectrometric radiocarbon analysis. These black […]
Mass Spectrometric Radiocarbon Dates from Three Rock Paintings of Known Age
Description: Radiocarbon age determinations are presented on three hieroglyphic texts from Naj Tunich cave in Guatemala containing Maya calendar dates. The ages obtained are on average 110-140 years older than the calendar dates. Several possible reasons are discussed for this discrepancy: one that is applicable to all radiocarbon dates on charcoal, one that applies to […]
Application of supercritical carbon dioxide-co-solvent mixtures for removal of organic material from archeological artifacts for radiocarbon dating
Description: 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 (Holkar et al., 2016; Poole and Cord-Ruwisch, 2004). Due to the detrimental impact of existing sheep wool processing techniques, the annual production of wool in […]
