Fig. 5.
Picture of the Monumental Complex of S. Pietro a Corte with the stratification of sediment layer (a silt and sand; b trodden soil; c backfill material; d cobblestones from Longobard age; e backfill material; f sand and gravel) above the current street level. Dotted red circle indicates the well, while the inverted triangle (▼) indicates the altitude above sea level. Dotted black line represents the average groundwater level, whereas the grey ones indicate the variation of this level during the year.