Many faults appear to form persistent zones of weakness that fundamentally influence the distribution, architecture and movement patterns of crustal-scale deformation and associated process in both continental and oceanic regions. This book brings together papers by an international group of Earth Scientists to discuss a broad range of topics centred upon the controls of fault weakening and the role of such faults during lithosphere deformation. Readership: Academic structural-tectonic geologists, microstructural geologists, rheologists, geophysicists and people studying geodynamics. Also, petroleum geologists, hardrock geologists, mining geologists, hydrogeologists and metamorphic geologists. Suitable for postgraduate students.