GNGTS 2019 - Atti del 38° Convegno Nazionale

110 GNGTS 2019 S essione 1.1 Fig. 2 - Above: view of the downslope fault zone exposed in the southern trench wall. Below: preliminary log from photograph of the downslope fault zone. Legend: 1) Dark brown present soil; 2) brown gravelly colluvium; 3) very immature fan deposit with sub-angular centimetric clasts; 4) coarse sub-rounded gravelly body with a roughly triangular shape 5) Sub-rounded to rounded alluvial gravel, centimetric to decimetric in size, (northward paleocurrents, i.e. parallel to the fault slope); 6) rounded alluvial boulders; 7) sub-rounded to rounded alluvial fan gravel, centimetric to decimetric in size; 8) very immature fan deposit with subangular centimetric clasts; 9) cemented debris with small angular clasts in brown sandy matrix including a level with small charcoal fragments (yellow star). Moreover, the knickpoint heights distribution suggests that fault segments of CMA and MUL that are far away from each other could be linked at depth with important implication on the seismogenic potential of the faults in the area. All the investigation listed above allowed to locate the fault segments with the most conspicuous evidence of activity during the late Pleistocene and Holocene and to select some