Old abandoned quarry in the NW slope of the Podhora Hill, overgrown by forest.
Located near Mariánské Lázně.
The locality belongs to a Tertiary (15,3 or 12,4 million years) volcanic body penetrating the Mariánské Lázně Metabasic Complex. Olivine nephelinites are probably non-differentiated products of mantle origin. Mineralogically interesting are coarse-grained parts with clinopyroxene + nepheline + melilite/leucite, sanidine + sodalite, olivine, magnetite, apatite (ijolites to turjaites).
References:- Ulrych, J., Pivec, E., Bouše, P. (1995) Minerální parageneze ijolitových vyloučenin v olivinickém nefelinitu Podhorního vrchu u Mariánských Lázní. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1995, roč. 3, 51-56.
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http://www.mineralos.cz/lokality/podhor/podhor.htm Mineral List:23 entries listed. 18 valid minerals.
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