(Pleschitzkogel, Hirt, Region Friesach - Hüttenberg, Kärnten, Österreich)
Ancient iron mines, working a limonite deposit hosted by marbles and micaceous slates. Located on Pleschitzkogel mountain near Hirt, about 5 km SE of Friesach.
Ref.:
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995