Page 262 - Numerical Analysis and Modelling in Geomechanics

F.PERGALANI, V.PETRINI, A.PUGLIESE AND T.SANÒ 243

Figure 8.12 Area struck by seismic sequence (earthquakes of Table 8.1, triangles) and
location of the investigated villages (circles) (Pergalani et al., 1999).

deposits, mainly formed by Scaglia Rossa and Maiolica cobbles, occur
extensively on calcareous slopes (Coltorti et al., 1979; Dramis, 1983; Coltorti
and Dramis, 1988). The alluvial terraces also refer to the glacial periods; they are
placed at different levels over the valley bottom and are often inter-bedded with
slope deposits; three main levels are found in the area but the number can vary
according to local conditions.
Lacustrine deposits are found in correspondence of intra-mountain basins; they
can reach thickness of 100 m and are formed by more or less regular alternances
of conglomerates, clays and sands; they are dated lower-middle Pleistocene.
Finally, travertine deposits are widespread all over the area; they are mainly