These "fault rocks" were born from the more or less intense fragmentation of the rocks in the fault zones. Different types of fault rocks are distinguished according to the size of the elements, the cohesive character or name of the matrix, and the proportion of matrix relative to the elements. The cataclasites have a cohesive matrix whereas the breccias and gouges have an incoherent matrix.
STRUCTUROTHEQUE - Collection de Géologie structurale de l'Université Paris Sud - Sité réalisé par Cyrille MENGUY - Géomatique appliquée à l'Environemment - Août 2016