Three assay tunnels dug by AGIP Minerary Activities Dep., around 1300 m above sea level at Costa Magrera. The area is not very far from the most famous uranium mine of Novazza. The U minerals are included into a metamorphic sandstone rich of volcanic clasts "Verrucano Lombardo".
References
Zambelli O. (1978) - Minerali Uraniferi in Val seriana (Bergamo) - Rivista Mineralogica Italiana, Milano, Vol. 9, fasc. 3, pagg. 82-83
Gramaccioli, C.M., Scaini, G., Gentile, P., De Michele, V., Mannucci, G. (1992): Natura in Lombardia. I Minerali. Regione Lombardia, Ed., Milano, 223 pp.
Maida, F. (2002): Descrizione delle specie e varietà di minerali e loro ritrovamento nella bergamasca. G.O.M. Gruppo Orobico Minerali - Novecento Grafico, Ed., Bergamo 82 pp.
Mineral List
12 entries listed. 11 valid minerals.
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