Jarosite

Sukayu hot spring

Arakawa, Aomori city, Aomori pref., Japan

Field of view: 10 mm. Jarosite associated with geothite. The yellow massive part is jaroseite. The interbedded black part is massive goethite.

Recovered from a goethite-jarosite deposit formed by bacterial Fe biomineralization from Fe-Sulfate spring water. Formed in less than a million years.

Other localities

List of Japanese jarosite localities

Io valley (Fumarole, Granular)
Sukayu hot spring (Bog Iron, Massive)
Kawazu Mine (Hydrothermal, Granular)