Newer mineral layers from the Triassic are found only in sporadic deposits and discontinuous layers within town limits. This is the Röt formation, which crops up in the headwaters of the many small brooks around the town. The Lower or Middle Muschelkalk that overlies it can only be found in a narrow, west-to-east running rift stretching between Heenes and Oberrode, north of the inner town. The newest mineral layer from the Triassic – the Lower Keuper (for example the so-called "Lettenkohlensandstein") – is only preserved in the region under a lava flow, which does not show itself above ground anywhere near the town.