Supplementary methods and data: From distant volcanoes: obsidian and early Neolithic connections on the Şanlıurfa plateau

Supporting data, code and methods for the article From distant volcanoes: obsidian and early Neolithic connections on the Şanlıurfa plateau.

The package contains an evidence register for 24 Şanlıurfa-area localities with reported Pre-Pottery Neolithic remains. It also includes data from regional comparison sites, coordinate records, notes documenting checks of the published sources, supplementary methods and figures. Supplementary Tables S1 and S2 are provided as Excel workbooks.

The modelling files contain 22 source–site paths: three source alternatives for each of six local destinations, plus four regional comparator paths. Nine paths to Harbetsuvan Tepesi, Karahan Tepe and Göbekli Tepe form the principal analysis. A further 54 sensitivity runs test how changes in model settings affect the results for these nine paths. Code, model inputs, saved elevation data and numerical outputs support reproduction of the calculations.

The evidence register separates evidence that obsidian was present from evidence of where it came from. Surface finds are not automatically assigned to a locality’s Neolithic occupation. Modelled paths compare geographical scenarios; they neither identify the sources used nor establish routes travelled.
Start with SUPPLEMENTARY_FILE_GUIDE.pdf for the contents, methods and instructions for reproducing the calculations.