7 research outputs found
Geometry, kinematics and rates of deformation in a normal fault segment boundary, central Greece
The geometry, kinematics and rates of deformation within a fault segment boundary between the ends of two major active normal fault segments have been investigated through examination of a faulted 126 ka marine terrace. Slipāvector azimuths defined by striations on the faults indicate NāS extension on c. EāW faults, subāparallel to those from earthquake focal mechanisms, together with significant and contemporaneous EāW extension on c. NāS faults. Summed rates of EāW extension along a c. 550 m transect (0.17 mm/yr) are comparable with those for NāS extension (0.20 mm/yr) along a c. 350 m transect. Our observations show that distributed nonāplane strain extension occurs in fault segment boundaries and this should be noted when studying faultātip fracture toughness and regional deformation rates