The features of extensional (‘normal’) faults are evident in the epicentral region. Repeated earthquakes have likely pushed down the basin in which Norcia sits, and uplifted the range in which Castelluccio is nestled. Wineglass valleys are unique to extensional fault-sculpted landscapes, and the giant landslide above Castelvecchio was probably triggered by a past Preci or Campi Fault quake. These faults are schematically shown by Galadini and Galli (2000).
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