Page 119 - Microtectonics

4.4 · Lattice-Preferred Orientation (LPO) 107

Fig. 4.43. a Illustration of the contribution of equidimensional quartz crystals with aligned <a>-axes and basal, rhomb or prism slip planes
to a Type I crossed girdle pattern formed in coaxial progressive deformation. Ornamentation of contoured patterns of c- and a-axes in polar
diagrams as in Fig. 4.42. b The same for several patterns that develop in non-coaxial progressive deformation. At right a pattern that devel-
oped by slip in direction of the c-axis