Prominent hill of a Quaternary trachyandesite locally containing xenoliths. The trachyandesite hill is Neogene (1.6 Ma). The fluoro-magnesiohastinsite decribed from this type-locality forms idiomorphic, long-prismatic crystals up to 3 mm, often associated with fluorophlogopite.
Refs.:
- Koch A. (1878): XXII. Neue Minerale aus dem Andesit des Aranyer Berges in Siebenbürgen. Tschermaks Mineral. Petrogr. Mitt. 1, Neue Folge, 331-361.
- König, U., Benea, M., Göske, J., Pöllmann, H. (2001): Der Berg Magura Uroiului in Rumänien – Locus Typicus des Pseudobrookits. Der Aufschluss 53, 271-281. (in German)
- Bojar, H.-P. & Walter, F. (2006): Fluoro-magnesiohastingsite from Dealul Uroi (Hunedoara county, Romania): Mineral data and crystal structrure of a new amphibole end-member. Eur.J.Mineral. 18, 503-508
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Map Reference: 45°52'N , 23°2'E
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