The Feldbiss fault in the Maas valley bottom (Limburg, Belgium)

Abstract

An intensive geoelectric campaign in the Maas valley (Rotem area, Limburg, Belgium) allowed the location of the Bichterweert scarp, a (buried) scarp at the base of the Maas valley bottom gravels. This scarp, tectonic in origin, is attributed to the Feldbiss fault system at the southern border of the Central Graben. The Bichterweert scarp is the result of Saalian and Weichselian movements. Due to this activity the thickness of the Maas gravel beds suddenly increases north of the scarp. The electric specific resistivities are a measure for the gravel quality.