ROMAN POTTERY FROM AUGUSTA PRAETORIA (AOSTA,ITALY): A PROVENANCE STUDY

Forty-five sherds of Roman pottery, 21 terrae sigillutae and 24 common wares excavated in Augusta Praeroria, were analysed for 12 elements by atomic absorption and emission spectroscopy. Hierarchical agglomerative cluster analysis, principal component analysis, and non-linear mapping were performed on the analytical data in order to classify the objects in groups which could account for different provenances; soft independent modelling of class analogy (SIMCA) and K nearest neighbours (KNN) were used for solving doubtful assignments. The classification results indicate that local productions of terra sigillatu can be easily distinguished from the imported ones, and that common wares have compositional patterns which differ from those of both local and imported terrae sigillatue.