Symmetric structures in ductile shear zones range widely in shapes and geneses. Matrix
rheology, its flow pattern, its competency contrast with the clast, degree of slip of the clast …

The rotational behaviour of rigid objects in a weaker rock matrix during deformation has
been the subject of many field, experimental and numerical modelling studies, often centred …

Clast-based methods for estimating the mean kinematic vorticity number Wm are
compromised by strain localization at the clast margins. Localization increases with modal …

Theories and numerical solutions for a viscous ellipsoid in an infinite anisotropic viscous
medium subjected to far-field homogeneous deformation lie at the heart of self-consistent …

Asymmetric porphyroclast systems have long been used as independent shear-sense
indicators based on their clast-tail asymmetry and/or stair-stepping tail geometry. Over the …

The forty-year history of the Journal of Structural Geology has recorded an enormous
increase in the description, interpretation and modelling of deformation structures. Amongst …

An iterative, semi-analytical solution is derived for deformation of an elliptical (in cross-
section) power-law viscous inclusion within an infinite linear viscous matrix undergoing a …

A mathematical model for rigid inclusions with a slipping interface immersed in a general 2D
homogeneous deformation is developed. Under bulk pure shear inclusions are expected to …

Rigid inclusion models have reached a stage where one should be able to use them to
obtain quantitative values from ductile shear zones. We used natural data collected in three …

A description of the systematic errors associated with the measurement of the vorticity
number from poryhroclasts in natural systems is presented and discussed. We show that …