Through the Zellertal valley between Bad Kötzting and Bodenmais another Pfahl-like slate zone runs parallel to the actual Pfahl and in which the quartz does not immediately outcrop. This 'secondary pfahl' is called the Rundingen Pfahl Zone (Rundinger-Pfahlzone). Its southeastern outcrop lies near Bettmannsäge southwest of Zwiesel. There is another secondary pfahl in the southeast of the Bavarian Forest, the Aicha-Hals Secondary Pfahl (Aicha-Halser-Nebenpfahl), which is responsible for the double bend on the Ilz near Hals as well as a bend in the River Danube to the north just behind Passau. There is yet another one between Kirchberg vorm Wald and Gerlesberg.