Do we need brittle precursors to initiate shear zones? Constraints from laboratory experiments
Livia Nardini1, Erik Rybacki1, Luiz Morales2 and Georg H Dresen1, (1)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (2)ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland
