“…Two-dimensional image analysis on rock-sections gives direct quantification of the SPO fabric ellipse (Launeau et al, 1990), while tensorial reconstruction applied to any three perpendicular sections yields the SPO ellipsoid (Owens, 1984;Launeau and Cruden, 1998;Launeau and Robin, 2005). Many studies have applied, sometimes combining, these two approaches to determine the flow dynamics during magma emplacement in dikes (Philpotts and Asher, 1994;Tauxe et al, 1998;Callot et al, 2001Geoffroy et al, 2002;Féménias et al, 2004;Poland et al, 2004;Bascou et al, 2005, Philpotts andPhilpotts, 2007;Aubourg et al, 2008, Hastie et al, 2011, lava flows (Cañón-Tapia et al, 1995;Cañón-Tapia, 2005;Loock et al, 2008) and domes (Arbaret et al, 1993;Cañón-Tapia and Castro, 2004;Závada et al, 2009). When identical, AMS and SPO fabric properties are linked to magma flow dynamics by applying the theory of the motion and rotation of the crystals in the sheared medium (Dragoni et al, 1997).…”