Eine Interstadiale Torfschicht bei Nijmegen (Niederlande) und deren Bedeutung für die Erklärung der dortigen landschaftsmorphology

Abstract

An interstadial peat layer near Nijmegen (The Netherlands) and the meaning of this layer for the explanation of the surrounding landscape morphology. The Geological Map of The Netherlands (1935,1947) defines the sandy plain west of the glacial push moraine of Nijmegen as a fluvioglacial drift plain. Pons (1957) has noticed, that this plain is divided into two steps. These steps are separated by a low landscarp. We suggest that the Würm glacial dry valleys of the upper step terminate at the landscarp and that the lower step does not consist of Riss glacial sandr material as was thought previously, but that it is composed of the laterally fused, very flat alluvial cones of the dry valleys of the upper step. We base this opinion mainly on the presence of a moershoofd-interstadial (ca.45.000 years old) peat layer in the sediments of the lower step.