Shear bands if not hard-linked along rectilinear traces are made up of echelon segments both on a nearly vertical section (Figure 1a) and on a nearly horizontal section (Figure 1b) in Aztec Sandstone, Valley of Fire State Park. Here, the segments are numbered. Number 4 corresponds to the same segment in both views. Figure 2 shows a series of mostly hard-linked segments of shear bands in Navajo Sandstone with the original segments still identifiable. The hard link geometry has been referred to as 'eye structure' by Antonellini and Aydin (1995), 'duplex structure' by Cruikshank et al. (1991), and 'lozenge structure' by Awdal et al, (2014).

Figure 1. A series of shear bands numbered from north to south on a pavement of Aztec Sandstone near the Willow Tank thrust front, east of the Willow Tank parking lot, Valley of Fire State Park, Nevada. Note that Number 4 in both frames is the same. (a) is nearly a cross section; (b) is nearly a map view. Also, some of the adjacent segments are not linked but some others in the southern end of the (b) frame are hard linked.

Figure 2. A series of shear band segments which are hard-linked on a pavement of Navajo Sandstone. Field notebook is about 20 cm long.