One of the most intriguing and (from the point of view of modeling) poorly understood aspects of geomaterial mechanics is strain localization. Strain localization is a common feature of viscous, elastic and/or plastic materials undergoing non-homogeneous deformation. During the deformation of rocks or magmatic suspensions, strain may be variably partitioned (spatially and in magnitude) between phases or multi-scalar heterogeneities of variable strengths, which may promote the development of shear zones and/or shear bands (e.g., Wright and Weinberg 2009); as such, strain localization is a scale-dependent phenomenon that may range between discrete and pervasive deformation. Strain localization takes place in...
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