(Grube Holzappel, Holzappel, Laurenburg, Lahntal, Rheinland-Pfalz, Deutschland)
Ancient workings on a Zn-Pb-Cu vein, hosted by clay schists. Some dumps are still present near Dörnberg smelter (located about 1 km SSW of Holzappel) and on the banks of the Lahn river, about 1 km SW of Laurenburg.
Ref.:
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990