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Figure 4. Laser scan from spectacularly exposed neotectonic faults at Arkitsa, Gulf of Evia, Greece (Kokkalas et al., 2007, in press): (a) Laser scan point cloud. Polished areas of fault surface in foreground and background are two separate fault panels; (b) filtered and meshed surface from the fault panel shown in the foreground of (a), consisting of ca. 117,000 polygons, derived from 10 million laser scan points. Fault panel is 65m high; (c) Stereonet showing the orientation of a subset (N=5726) of the normals (i.e., poles) to polygons from the mesh shown in (b). Colours correspond to orientation of each normal relative to the mean orientation. (d) colours from (c) re-projected onto the meshed fault surface, to emphasise changes in orientation of the surface. This makes it easier to visualise fault curvature, corrugations, and small-scale rupturing and fracturing of the fault surface.