This session is to honour the memory and outstanding contributions of Professor Jacques Angelier who passed away in early 2010. Professor Angelier was one of world's greatest structural geologists. He made outstanding contributions to our current understanding of brittle tectonics, in particular crustal stresses and fracture/fault development. In this session we welcome general contributions on brittle tectonics and, in particular, on the following topics:

1. Theoretical studies of crustal stresses. Relevant topics include, but are not restricted to, palaeostresses, stress-tensor inversions from earthquakes, stress permutations, in situ stresses from hydrofractures, stress measurements in general, stress modelling (stress deflection, local stresses).

2. Regional studies of crustal stresses and related structures. Relevant topics include the state of stress in various parts of the world, both current stresses and palaeostresses.

3. Fracture formation, propagation, and displacements. Relevant topics include fracture propagation, opening displacement of extension fractures and slips on faults.

4. Fault zones, fissure swarms, and fracture-related hazards. Relevant topics include studies of particular active fault zones and fissure swarms, and associated hazards, such as landslides and crustal movements.