Monti Arci, Sardinia, obsidian

Figure 2. Comparison ofINAA elemental ratios for the six Monti Arci (Sardinia) obsidian subgroups. Only geologic source samples are plotted...

Although we attributed artifacts to each of the four major western Mediterranean sources, our focus here is on artifacts attributed to Monti Arci, Sardinia. Figure 2 illustrates the use of elemental ratios to discriminate the major island obsidian groups by INAA. By projecting these data as logged ratios of samarium/barium on the X-axis and iron/cesium on the Y-axis, we have maximized the differences between the various Sardinian subgroups in a manner... 

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