(Val Ferrera, Hinterrheintal, Graubünden (Grisons; Grischun), Schweiz (Suisse; Svizzera))
A major southern branch of the upper Hinterrhein valley.
Ref.:
- Brugger, J. and Gieré, R. (1999) As, Sb, and Ce enrichment in minerals from a metamorphosed Fe-Mn deposit (Val Ferrera, Eastern Swiss Alps). Canadian Mineralogist: 37: 37-52.
- Brugger, J. and Gieré, R. (2000) Origin and distribution of some trace elements in metamorphosed Fe-Mn deposits, Val Ferrera, Eastern Swiss Alps. Canadian Mineralogist: 38: 1075-1101.