The small waters Unnerbach flows in east-west direction from the Breitsesterhof to Heimbach, where it pours together with the Heimbach into the Nahe River. During its run this brook drains also the find ranges of Mettweiler, Berschweiler, Eckersweiler, Fohren -Linden, Zinkweilerhof and Rohrbach.

The finds illustrated obtain to Holger Schroeck, who is collecting the waterworn nodules of this small water each year at least once.