3.1. Sites selection (before trenching) or scarp selection

Selected fault zones were chosen considering the morphological analysis and field investigation results.

Target portions of presumed active fault are (1998):

Mundolsheim scarp (a segment of Balsheim-Achenheim-Mundolsheim fault).

Achenheim Scarp (Wernert fault exposure)

Saverne sedimentary anomaly

Riedseltz exposed quaternary fault.