Effect of two-stage deformations on seismic velocity and anisotropy of sample 379. The wall rock represents the deformation in the first stage during the Grenvillian orogeny. Mylonite represents the deformation in the second stage during the Caledonian orogeny. Seismic velocity and anisotropy, calculated using the LPO data of olivine and cpx (Figures 7 and 5) with various wall rock and mylonite ratios, are plotted in the lower hemisphere using an equal-area projection. To understand the effect of two-stage deformation of the Hundskjeften peridotite on seismic anisotropy, seismic anisotropy was calculated using four different ratios of the wall rock and the mylonite: (A) 100:0, (B) 90:10, (C) 70:30, and (D) 50:50. Modal compositions noted in Table 1 were used to calculated seismic anisotropy. The P-wave velocity (Vp), amplitude of shear-wave anisotropy (AVs), and polarization direction of the faster shear wave (Vs1) are plotted against increasing mylonite proportion. The center of the pole figure (S) corresponds to the direction normal to the foliation, and the east-west direction corresponds to lineation (X).