INCB28060 bull Mardels are the result of natural and anthropogenic

On the Steinmergelkeuper abandoned quarries also occur, but at least some mardels on this formation have a natural genesis (subsidence after dissolution of gypsum veins).•The ages of anthropogenic mardels may rank from Roman Time to Middle Ages. It is complicated to determine the ages of natural mardels; they may rank from Early to Late Holocene.•The pollen records indicate Late Holocene ages of the deposits in natural and anthropogenic mardels.