Lower Pecos Canyonlands, TX (Other Keyword)
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Exploring new applications of portable X-ray fluorescence spectroscopy to the study of rock art, we report the determination of paint layer stratigraphy based upon measured elemental levels. In Lower Pecos rock art, we were able to discern when red and yellow paints superimpose black paints based on elevated levels of manganese. This ability to see underneath paint layers with "X-ray vision" shows great promise in answering stratigraphic ambiguities, complimenting Dino-Lite digital microscopy....
Two Independent Methods for Dating Rock Art: Age Determination of Paint and Oxalate Layers at Eagle Cave, TX (2016)
Using two independent methods, we provide reliable age estimates for three Pecos River Style figures at Eagle Cave in Langtry, TX. To obtain direct dates for the paintings, we employed plasma oxidation of the organic binders in the paint layer followed by accelerator mass spectrometry. For minimum and maximum ages, we acid treated the overlying and underneath accretion layers to isolate calcium oxalate for combustion and 14C measurement. The radiocarbon dates for the three paint samples are...