Galena

Field of view: 5 mm. Galena in a bedded manganese deposit. The small dark gray grains exhibiting perfect cleavage at the center and at the right are galena. Surrounding white host is composed of fine quartz formed by recrystallization of chert, the host of this deposit. Mn-bearing minerals are not observed in this specimen. The light brown part at the top and bottom is dirt by iron oxide.

Recovered from a chert-hosted bedded manganese deposit subjected to Hornblende-hornfels facies contact metamorphism by S-type (Ilmenite-series) granodiorite.

Galena from this location was described in 1972.