Fault Porous sandstone

rma ed. f faulti fracturing/crushing (cataclasis) related to high stress concentra-tions at grain contact points (e.g. Antonellini et al., 1994). The resulting structural elements are generally referred to as 2007), there are two main types of deformation bands. One is known as disaggregation bands (e.g. Mandl et al., 1977; Bense et al., 2003); a sub-type of these is known as phyllosilicate bands (framework phyllosilicate bands of Knipe et al., 1997). Disaggrega-tion bands form by localized grain reorganization, but practically no grain crushing. This type of band is the most common type of band at shallow deformation depths. The other type is referred to as cataclastic bands (e.g. Aydin, 1978; Aydin and Johnson, 1983; Davis, 1999), as grain crushing or cataclasis is an important mechanism