At the clearing on the left side you can see a deep cut, right and left are high, long overgrown waste dumps of the Michelau quarry. Here until the beginning of the 60s a very special basalt was mined. This basalt belongs to a lava flow that flowed out about 16-18 million years ago in the Miocene. As the lava flow came to a standstill, these vertical basalt columns formed as a result of the cooling. The Michelauer basalt was particularly well suited for the production of cobblestones, a road material that slumbers today often under tarpaulins and finds little use, because it becomes dangerously smooth, especially in the wet.
In the weddings almost 20 people found a job here, half of them were judges and day laborers. For almost 50 years, the quarry fell into a deep sleep, now Lothar Keil mobilizes his men to cut trees away to make the magnificent geotope accessible to a wider public. At least 17 million years old are these monumental basalt blocks. When they are exposed to the weather, they peel themselves down and become balls, which are particularly beautiful to look at. Smaller bullets are also found in the overburden - a nice occupation for the small fellow travelers: "Who finds the most beautiful bullet?" In the spirit of the immigrants, however, it is asked to search only in the overburden and not to interfere with the geotope itself.