GNGTS 2013 - Atti del 32° Convegno Nazionale

downslope by a small antithetic fault. Moreover it is slightly displaced (just a few centimetres) by a tiny fracture that downward is linked to a major fault. This interpretation would imply two surface faulting events. Even if radiocarbon and OSL dating are still in progress, it is possible to refer these paleoearthquakes to the Holocene. In fact, the gravel layer sealing the faults (level 2 in Fig. 3B) appears to be very young, most likely historical due to its correlation with a nearby layer containing roman pottery (imperial age). Fig. 1 – (A) Oblique view (based on a 20 m DTM) of the L’Aquila region with the net of capable faults. Legend: 1) primary fault; 2) secondary fault. (B) geological map of S. Demetrio ne’ Vestini. Legend: 1) colluvial and debris deposits (Holocene); 2) alluvial fan gravels and sands (upper part of Middle Pleistocene); 3) sands (upper part of Middle Pleistocene); 4) fan delta conglomerates (Lower to Middle Pleistocene); 5) whitish silty lacustrine deposits (Lower to Middle Pleistocene); 6) capable fault (not outcropping); 7) fault scarp edge; 8) location of the cross section shown in Fig. 2B; 9) trace of the ERT profile shown in Fig. 2C; 10) trace of the paleoseismological trench. (modified after Working Group MS–AQ, 2010). 30 GNGTS 2013 S essione 1.1