(Steinbruch Stolz (Graulai; Grauley), Hillesheim, Eifel, Rheinland-Pfalz, Deutschland)
An active quarry, owned by the Stolz company.
Minerals are either included in xenolites or do occur as late-stage phases in thin fissures of pneumatolytic origin (zeolites and carbonates). The quarry is famous for a number of rare barium minerals and skeletal perovskite.
Ref.:
- Hentschel, G., (1993): Die Lavaströme der Graulai: eine neue Fundstelle in der Westeifel: Lapis 18, nr 9, 11-23
- Blass, G., Emmerich, F., Graf, HW., Schäfer, Ch., Tschörtner, J., (2006): Minerale der Eifelvulkane, CD, published by authors
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Map Reference: 50°16'45"N , 6°40'36"E
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