Short note: A velocity description of shear fault-bend folding

This short note presents a derivation of the velocity description of deformation for the geometric models of pure-shear and simple-shear fault-bend folding. This allows the calculation of rates of displacement, uplift and limb-rotation associated with such structures and their comparison with classical fault-bend folds. Using this velocity description, we examine the differences between pure-shear and simple-shear fault-bend folds, in terms of uplift, limb rotation and particle trajectories resulting from deformation.