Galena (Var: Bleischweif)
Rodna Mine, Rodna, Bistrița-Năsăud County, Romania
Fracture surface perpendicular to the main shear (foliation) of the galena variety "Bleischweif" (curly galena) from the Rodna Mine, Rodna. "Bleischweif" occasionally appears in discrete ductile shear zones which have been reactivated after the main ore has crystallized, and galena suffered grain-size reduction during deformation. Old large grains ...
© Günter Grundmann, Detmold, Germany