At least since the early mesolithicum the larger flood plains in the Saar-Lor-Lux area are settled. Nevertheless the human impact is small in the beginning. In the Blies valley existed burned and fallow land ( the burned land is still to recognize in the profiles as charcoal bands). From the mesolithicum until roman time there was nearly no change in forms of the valley bottom as the human impact was small (verified by a low sediment accumulation). The natural vegetation still was largely intact.
The potentially natural vegetation in the investigation area is a mixed oak-hirnbeam forest on the hillsides and on the plateaus whereas in the floodplain a soft-wood riverside forest would grow. This vegetation probably also dominated at the beginning of the roman-celtic settlement phase. It is assumed that the hillsides were wooded and the flood plain was covered by sparse soft-wood riverside forest.