Fig. 2
From: Reactivation of variably sealed joints and permeability enhancement in geothermal reservoir rocks
Photographs of all samples after deformation. Top panel provides schematics of idealised samples containing bedding or joints oriented parallel, oblique, and perpendicular to the longitudinal axis of the cores. The bottom two panels contain photographs and sketches of joint-free and jointed samples, deformed to failure in triaxial compression. Dotted lines denote bedding; yellow bands denote joints; and dashed red lines denote experimentally induced failure planes